0. old, still waiting for ack
+ BUG: kicad I/O bugs:
	+ BUG: does not save the netlist [TwisteR]
+ FEATURE: external editor on buffer [report: TwisteR]

1. For the upcoming release ===============================================================================

2. For later releases ===============================================================================
- DOC: (prio) tutorial:
	- rename 7805 to 17_sch and re-enable step 3 text (uncomment)
	- install all tutorial steps
- CLEANUP: (prio) hidlib: move window placement code from dialog to a separate plugin and remove dialog dependency from the hid plugins reverting r24758 [report: Igor2]
- CLEANUP: (prio) Vuokko's list of warnings on OpenBSD: bug_files/warn-obsd-r24746.log [report: Vuokko]
- BUG: (prio) setenv() LC_ALL and LANG to "C" around setlocale; remove setlocale from lib_gtk; bug_files/locale.diff [report: osetroff]
- FEATURE: excellon metric support to pair up with gerber's late feature [report: Gabriel]
- CLEANUP: remove pcb_attribute_dialog() and the label argument from the DAD API [report: igor2]
- CLEANUP/BUG: The 'As Drawn' polygon contour is not displayed if the polygon is totally clipped out of existence even though it still exists in the layout. [report: Ade]
	-> need a new rtree that holds the polygons that have ->clipped == NULL for this purpose
- CLEANUP: move opendir/readdir in safe_fs from everywhere
- CLEANUP: pcb_layer_to_file_name() dest should be gds_t to avoid potential buffer overflow
- CLEANUP: remove hid_flag.h - probably merge the function into a menu related .h
- CLEANUP: DAD: centralize the coordinate input spinbox: hid_dad_spin
	- remove per hid implementation, get DAD macros to build spinboxes (maybe in brave mode first)
	- hid_dad_spin.[ch]: bind conf change on conf_core.editor.grid_unit, call pcb_dad_spin_widget_state() to get them updated:
		- drc & size: doesn't update on mil/mm change in top win -> need a list of spinboxes to update on conf change [report: Ade]
	- make the central unit infra more flexible so plugins can register new units
	- make sure we don't crash when grid or config references non-existing unit or unit that has no conversion field set up yet
	- propedit: relative modifications +x mils, #degrees broke [report: Igor2]
- CLEANUP: library window DAD-ification: remove pcb_act_LibraryShow()
	- FEATURE: library window: allow long tags and long location text to split
	- BUG: double check parametric footprint edit window: bug_files/parametric.txt [report: Piotr]
- CLEANUP: think over how to handle subc selection: selecting all parts automatically is bad for propedit; bug_files/subcsel.bug [report: Wojciech]
	- BUG: adding attribute works on subc parts but deleting attribute stops after deleiting it from a subc; bug_files/subcsel.bug [report: Wojciech]
- CLEANUP: DAD close sequence: TODO#51: there are three sources to trigger hid_ctx (caller's free on modal, close button free and window destroy callback); requre the user to always call free last and add bits to track what frees are already called and free(ctx) last; test in 4 situations: (modal,nonmodal)*(close_buttons,wmclose) [report: Igor2]
- CLEANUP: color:
	- remove per hid, non-backup-lib custom color structs
	- COLOR_TO_STR should not use sprintf - remove stdio.h
	- rewrite lesstif conv so it wouldn't use the string version anymore
	- rewrite gtk conv so it wouldn't use the string version anymore
	- remove src/hid_color.[ch] and src/color_cache.[ch]
	- remove pcb_color_t ->str, convert only when really needed
- CLEANUP: non-modal fontsel: refresh on text font change from other source [report: Igor2]
- CLEANUP: find.c rewrite:
	- CLEANUP: a new "report(NetLength)" should not care about netlists but depend on find.c only
	- BUG: unplated padtsakcs shall not connect layers; problem: a padstack is either found or not, this affects all layers, there's no info about which layer is found; padstack update should check the hole/slot geo and update a bit for each shape telling whether it's connected or not
	- BUG: bug_files/rat_shortest.lht: because of "don't add non-manhattan lines" part [report: pstuge]
- CLEANUP: layer order from data
	- central code for building a list of layer groups ordered by draw from front to back (omit disabled/invisible layers)
	- rewrite both the draw_everything() and pcb_search_obj_by_location_() layer loop to use this list
- CLEANUP/feature: pcb_subc_smash_buffer() should really copy data so it can smash multiple subcs and subc objects end up on the layer they were bound to [report: keantoken]
- CLEANUP/BUG: undo operation while drawing a multiple segment line doesn't change segment attached to the crosshair [report:wojciechk8]
	- tool_line.c depends on pcb_undo()'s return value; can be fixed only when the old undo system is removed
- CAM:
	- CLEANUP: move excellon to a separate plugin, move aperture to a lib plugin, make gerber depend on excellon (for backward compatibility) instead of reinventing it
	- FEATURE: make the drill exporter sort drills by attributes, an user configured table telling which drill (by attribute) ends up in which file (for support for plugged vias/filled vias) [report: Vuokko]
	- FEATURE: invent a generic API for both the drill attrib config table
	- CLEANUP: unify how output files are accessed/checked: confirmation on overwrite
	- CLEANUP: later: remove the gerber->drill dep and ask users to use the CAM instead
	- CLEANUP: later: remove the hackish gerber layer suffix in favor of CAM [report: Ade]
- CLEANUP: (TT) propedit revamp:
	- test under lesstif
	- CLEANUP: remove Attrbute() and pcb_act_Attributes -> remove; this should be handled by the property editor when lesstif already supports it.
- FEATURE: data model: object minimal clearance value from the polygon side; final clearance should be MAX(obj->Clearance, poly->Clearance); kicad example: 1 line, 2 polygons with 2 different clearance values - see CUCP#38 provided by Karl [report: Igor2]
- FEATURE: netlist2: bug_files/ratside.txt optional rats constraints [report: Vuokko]
- FEATURE: (TT) route style upgrade to prototypes:
	- BUG: set same {e s s} doesn't work on padstacks [report: Igor2]
	- BUG: padstack doesn't show drc xor shape while moving - because the whole drawing is a cheat for old vias [report: igor2]
	- replace the route style dialog box's via part
	- proto copy to buffer - a buffer with a single padstack should also serve as a prototype copy vehicle? or just import by a list from the buffer
	- load/import from buffer and file
	- CLEANUP: remove PCB_MIN_PINORVIA* PCB_DEFAULT_DRILLINGHOLE macros - nothing should use them anymore
	- add text font, update the pool node text_edit [report: Igor2]
- BUG: autorouter broke on polygons: bug_files/ara.lht, {a r a}, bisect; broke before r14572 [report: Igor2]
- CLEANUP: add the thin line draw optimization to the filled poly optimization, including hole, in hid_draw_helper (search for last_x); make this configurable for both (exporters shall not optimize!); remove the similar optimization from hidgl triangulation and gdk and lesstif [report: Ade, Peter]
- FEATURE: fontsel: ttf import?
- FEATURE: tedax etest save (board save too)
- FEATURE/BUG: bug_files/lines - remove zero length objects if they are created as the result of rubber banding [report: Evan]
- FEATURE: extend the CAM job script syntax so that XY and other non-layer exporters can be called [report: celem]
- FEATURE: view list: import sch. shouldn't select elements to be removed but put them on a drc list
- FEATURE: drc preview: follow board flips (should be a DAD preview flag) [report: Igor2]
- FEATURE: DOC: new examples
	- blinking led with parametric footprints
	- example of nonetlist: 1206 jumpers and logos
- feature plugins:
	- FEATURE: autocrop doesnt undo (new layout, add some -maskmanaul content, autocrop(), & undo: gui view shifts, board size unchanged [report: Miloh]
	- BUG: distalign pcb_crosshair option doesn't work as a reference point  [report:Miloh]
- CLEANUP: move import_sch to import_sch_old and start a new, generic plugin
- CLEANUP/FEATURE: boardflip doesn't function properly with undo -- repro: open pcb-rnd, place 1206, boardflip(), { u u } removes placed part instead of boardflip   [report: Miloh]
- FEATURE: padstack bbox:
	- per layer: keep a bbox per transformed shape per prototype, then getting the bbox of a padstack ref on a specific layer is looking up the shape, then 4 integer additions [report: Wojciech]
	- when calculating overall padstack bbox, ignore layers that are not present? but then a layer change would require a recalc (but this is true for subcs too!) [report: Wojciech]
- XOR rendering upgrade:
		- experiment with 'emboss' kind of drawing instead of xor so rendering can stay 'direct'
		- if worked: allow padstack xor draw to draw all shapes on all layers
- opengl:
	- BUG: heavy swapd +/- crash with radeon AMD GL driver, fixed by exporting LIBGL_ALWAYS_SOFTWARE=t GALLIUM_DRIVER=llvmpipe [report: erich] 
	- BUG: --gui gtk2_gl pcb-rnd library preview pane is black (  doWindows(library) ) [report: Miloh] 
- export_dsn/new io_dsn (with King Kevin and celem):
	- missing global padstack (via) export:
		- FEATURE: need to think over and check the spec for how to do this with no-hole padstacks
		- RTT tests: thermal_layer.dsn, comp1.dsn, padstack.dsn
	- BUG: elem_pads_ds: do not export line shape in padstacks as polygons, that kills round cap lines
- FEATURE: draw on move: 'Crosshair shows DRC clearance' should show the clearance also when moving a ... (not only when placing it) [report: wojciechk8]
	- need to precalculate and cache clearance shape in crosshair (polyarea!) because recalculating these for padstacks would be expensive (also rewrite lines and arcs)
	- padstack
	- clearing polygon
	- text
- SUBC: element removal:
	- CLEANUP: convert pcblib to subcircuits:
		- revise the value attribute - should be empty by default
		- remove old install elements
		- dir rename trunk/pcblib/tru-hole should handle make correctly and not walk on existing web services or user installs
- FEATURE: key rewrite: (base key swap bug (q<->a, y<->z))
	- for <char> (punctuation): learn key for non-US users
	- lesstif code upgrade for the new API
	- menu file fixup on punctuation in lesstif
- FEATURE: extedit: when editing subc with pcb, save configuration and load it in the external pcb-rnd so that grid sizes and other settings are preserved [report: jg]
- FEATURE: undo on new layer from right-click menu in gtk layersel doesn't work
- FEATUER: gtk layersel: consider to provide a config setting for making open-group-name horizontal [report: istankovic]
- FEATURE: preview widget: allow to handle keys both in gtk and lesstif
- FEATURE: no-export attribute: cache a no-export attribute in a bitfield (e.g. flags like no-export for vector outputs, pixel outputs); exporter should set the bits in HID; core rendring should decide what to draw; use case: poly clearance to emulate keep-away on outline, and replace the old zero-width line trick [report: karl]
- CLEANUP: fp_fs_search: kill anything that gets ':' separated string as path list, get a config list instead
- CLEANUP: Mark
	- see pool node mark_cleanup
	- mark bug - ortho shouldn't use it, it should use last point (crosshair.X2); make sure nothing else abuses it [James]
- unravel the undo code
	- FEATURE: grid size change should be undoable? [report:Evan]
	- FEATURE: maybe other conf settings too?
- res/menu:
	- FEATURE: load/swap menus (TODO#1)
	- CLEANUP: search for vendor in the hid plugins, there should be no trace of it (vendor should register its in submenus with anchors)
	- CLEANUP: re-add dynamic menus after a gui change:
		- provide hooks and let plugins deal with a re-add as they may be added anywhere
	- FEATURE: fungw: auto-remove menus by cookie (TODO#2)
	- FEATURE: load new res on the fly (replace the menu system):
		- low level reload code (re-add the dynamic menus too!)
		- action to reload if file name is known
		- gui load dialog with tags listed
- CLENAUP: decide about exporter policy:
	- png exports selection (even in not-as-shown), others don't
	- extend png hid attribs with a flag for this, maybe do the same for others
	- document the decision in "hacking"
- FEATURE: project specific menus from extra lihata files - maybe from project.lht
- BUG: Lihata persistent save:
	- flag compatibility: save unknown, string-flags as loaded by io_pcb
	- ind: FONTS: second font indents incorrectly
	- ind: indentation bug in inline struct therm: closing } is preceded by indentation whitespace for some reason
	- keep numeric format: test all
	- keep unknown subtrees
	- doc/user/02_model/src/obj_arc.lht: Open/Save : Font section is embedded. Once manually removed, the file shows many diffs w.r.t original. Lihata V1 file. [report: Alain]
	- BUG: lhtpers indentation: bug_files/lhtpers_ins/; breakpoint in pers_table.c:34 and debug why the newline is getting in [report: Igor2]
- query & advanced search
	- FEATURE: search expr wizard should pick up the expression from the button when clicked
	- CLEANUP: make a run on a large board, speed test, with -O0 and -O3:
		- iteration speed (a simple @)
		- eval speed (a simple @ with a lot of constants in an expr)
		- geo speed
		- regex and string cmp match speed vs. select by name
- CLEANUP: rewrite layer undo; take it out from old_undo; layer del breaks on undo: can't save where it was added before. Consider the whole layer move and -1 business obsolete and rather add a separate insert and remove call?
	- BUG: add new layer in main window, pcb-rnd issues pcb_warning yet action is placed on undo stack [report: Miloh]
- CLEANUP: parent subc update:
	- inhibit mechanism to speed things up:
		- under inhibit, pcb_subc_part_changed(ps) should mark subcircuits dirty
		- when inhibit drops to zero, revisit all subcircuits that are dirty
		- get a common inhibit function for batch processing that turn on draw, poly clip and pcb_subc_part_changed inhibit
- FEATURE: holes should be drawn below silk and mask - this could be a config setting
- BUG: I/O bugs:
	- kicad:
		- BUG: parser does not process trapezoidal pad definitions [report: erich]
		- BUG: parser not parsing obround pad rotation, rot, (at x y rot), see work/bug_files/obround-rotation.kicad_pcb [report: erich]
	- eagle:
		- BUG: eagle binary library load fails with assert when pad dimension == 0, drill != zero. Bug arises from uninitiliased st.ms_width minimum feature width DRC value. This does not manifest in XML load as it initiliased to default value of 10mil before the DRC block is read, and updated if specified in the DRC block. There is no DRC block in an eagle binary library, so a decision has to be made wrt to where a default minimum feature size is to be referred to, so that the pad/hole reading code can apply it when pad dimension is not specified at line 824 in read.c. If dimension is not present, but drill is, read.c correctly applies the DRC derived rv_pad_top at line 818 dia = eagle_get_attrc(st, subtree, "diameter", drill * (1.0+st->rv_pad_top*2.0)); Planned changes to rectangle parsing to geenrate copper rectangles, not four lines, will alter +/- eliminate the need for the rectangle read routine to have ms_width available pre DRC read. See bug_files/e-motoren.lbr. [report: Erich]
		- BUG: text rotations not quite right in eagle binary format layouts. See bug_files/tvbgone3-brd-in-eagle.png. Seems 180 and 270ccw rotation are rendered as upright an 90ccw rotation. Hmm. [erich]
		- BUG: valgrind shows memory leaks relating to binary load. See bug_files/e-motoren.lbr [report: erich]
		- BUG: on loading bug_files/diode.lbr, pcb-rnd's clipping polygon out of existence routine seems to go into a non terminating loop [report: erich]
		- layers for top and bottom soldermask, if not present in loaded eagle file, i.e. tvbgone3.brd, do not export on creating gerbers, and cannot be added easily to layout via layer prefs, since ability to add a soldermask group is lacking [erich].
		- eagle XML import fails on polygon import reported by miloh, test file alien_formats/eagle/OSHW_XML_examples/eagle_polygon_crash.brd [report: erich], due to input file containing an invalid polygon: a self intersecting poly in line 156 - consider handling "width"?
		- eagle rectangle parsing should generate a rectangular feature, not a four line rectangular outline [erich]
		- eagle XML wire elements need to have "curve" attribute processed, if present. i.e. arcs. Can see translate2geda for hints [report: erich]
		- eagle binary format appended text block needs to be parsed and the text strings allocated to ASCII-127 references in preceding text blocks [erich] 
		- eagle binary format v3 and libraries do not have a DRC block specifying restring or minimum feature widths. Binary loader should add a DRC block in these cases to the tree with the minimum settings needed for padstacks and features to load sensibly. [erich].
		- bin: padstack clearances for element pins will rely on connectivity to other polygons layer by layer defined in the netlist 
		- bin: need to refine naming of library (.lbr) elements in loaded .lbr files; any text names in the binary tree, if starting with ASCII 127, sequentially reference strings in the text block which comes immediately after the board/design tree. In later eagle binary versions, the text block seems to become a node of the tree, but a node of arbitrary length, not 24 bytes, with length of block still encoded in first few bytes. 
		- bin: need to add support for non top silk (tPlace), tDocu and top copper text in read.c
		- bin: layouts, once loaded, have issue where deselection of elements only deselects element pins/pads. click-drag of element or saving the layout to .lht and reloading fixes the deselection issue. Example FTSH.... library file for a header exhibits this behaviour.
	- revise all I/O plugins for:
		- text thickness
		- text rotation
		- padstacks
		- new outline/mech layers and slots
		- new doc layers
- FEATURE: scripting: example script that tents/untents all/selected/object vias [report: keantoken]
- BUG: lesstif clip_set() doesn't seem to affect the X clipboard
- BUG: open gl polygon rendering: white line between just-touching polygons, may need a line clearance too; bug_files/gl_poly.lht [report: keantoken, Ade]
- BUG: Rubberband move line endpoints ignores connected arc endpoints. [Fixing:Ade]
- BUG: find.c: bug_files/find_slotcop.lht: plated slot should connect to any copper layer object it is going thru ml2571 [report: Igor2]
- BUG: pref: set role to user, add new library path -> it is saved in board! [report: aron]
- BUG: bug_files/rubberx.lht: move the horizontal line upward, rubber band breaks the traces (ortho mode) [report: aron]
- BUG: wandering lesstif window (window placement bug): using icewm, open the property editor, close, open, close, open: it's displaced by decoration [report: Igor2]
- BUG: io_pcb hole clearance import: Peter's report: "bug: .fp/.pcb import..." ml2933 [report: Peter]
- BUG: bug_files/bug_silk.lht: swap board, far-side color applies only to the first silk because it's not done by group but by layer [report: Peter]
- BUG: bug_files/bug_silk.lht: while top copper layer is active, selecting/moving/deleting ojects on the bug-silk layer (diagonal line) doesn't work properly [report: Igor2]
- BUG: bug_files/drc-pstk.lht: via-line "too close" is missed [report: Peter]
- BUG: direct gerber export (with which naming style?) results in empty drill gbrs ml=2928 [report: Peter]
- BUG: png export: the no-plating mark should not be drawn on png unless 'as-shown' is enabled ml=2931 [report: Peter]
- BUG: bug_files/warn.lht: load, click to somewhere to remove the warning (orange): object flag cleared but the board is not marked as changed [report: Peter]
- BUG: bug_files/macrofab_rot/: rotation (and coords?) is off on xy for macrofab [report: celem]
- BUG: bug_files/cam_layer_bug.lht: after cam export (from gui) the mask and paste layers are visible but the layer selector is not updated  - r24366 supposed to fix this [report: keantoken]
- BUG: undo: clear rats, optimize rats, delete 1 rat then undo - it should undo the rat deletion but it undos optimization
- BUG: lesstif hbox/vbox allocation issues: test with bug_files/ltf_fillbox/ patches applied, with the fontsel action; opening it multiple times will randomly show or hide the button
	- fontsel() -> no buttons (if the preview has no extfill, they appear!) [report: Igor2]
	- about box: if not high enough, hbox/vbox/tab gets confused [report: Igor2]
	- 0 room allocated under HPANE: pstklib(), netlistdialog(), propedit(), BrowseScripts, preferences dialog config tab
	- preferences dialog: library, layers tabs are unusable [report: Igor2]

3. Long term ===============================================================================
- BUG: draw a large padstack poly (as a subc term); put some vias (padtsacks) on top of it; with gdk and gl, after the 6th via some via rings will disappear [report: James]
	-> reason: order of padstack shape rendering is random
	-> we should probably render large objects first then smaller ones
- BUG: gtk2_gl: RTT/arc_sizes.lht - elliptical arc corner case render bug [report: Wed]
- FEATURE: "thermal recipe" so a padstack thermal can be put in a padstack or subc and it is change with the layer binding [report: jg]
- CLEANUP: layer group rewrite: remove PCB_MAX_LAYERGRP and PCB_MAX_LAYER and make them dynamic
- FEATURE: io_pcb: new, optional "layer tag" field in mainline's file format
- FEATURE: layer binding dialog: manual layer binding (reuse csect?)
- CLEANUP: reduce
		- export_bom: rewrite the string list code using htsp and/or lists
		- hash in hid_attrib.c?
		- gcode invents .png name locally
		- get rid of gcode/lists.h,  and vector.[ch] (autorouter)
		- vendordrill
			- search for /units, replace it with pcb-printf something
			- add round down
			- replace ignore_refdes, ignore_value and ignore_descr with genvector
- vendor drill plugin:
	- CLEANUP: check if we want to keep vendor name
	- FEATURE: vendor: be able to load multiple vendor files (project spec for skips, central for vendor) [report: celem]
- FEATURE: lihata v7
	- remove via geometry from route style
	- remove netlist net ->style, should be a plain attribute (but keep the dedicated field in old versions)
	- save and load rat anchor object idpath
	- poly side clearance when it is introduced in the data model3

Lesstif:
	- implement/enable local grid in lesstif (menu option is disabled)

GTK2:
	- next_gui: keep them open, hide

FEATURES
- BUILD: menuconfig and a config file for scconfig
- menu item for export of multiple selected layout elements to discrete .fp files

4. Low prio ===============================================================================
- FEATURE: footprint in-place replacement should match up floaters to keep their coords, as documented in ML/2304 [report: gpaubert]
- FEATURE: filled vias for via-in-pad: http://www.saturnelectronics.com/products_capabilities/via-in-pad.html
- FEATURE: depth controlled mech layers (routed) for internal cavirites: http://www.saturnelectronics.com/products_capabilities/internal-cavity_boards.html
- BUG: 1. place 0603; 2. select; 3. cut to buffer; 4. undo -> 0603 put back but selection is lost; reason: the flag is removed in the buffer, but not in an undoable way as we don't have undo on buffer [report: igor2, miloh]
- BUG?: Far-side silk text can be selected and moved when the mouse is over front-side subcircuit. (but this is what we had with elements too! -> rewrite search.c to be a 'script' config) bug_files/farsilk.lht [report: Ade]
- BUG: RTT/arc_sizes.lht - unable to move arcs which have different width and height [report: Ade] - rewrite pcb_is_point_on_arc() elliptical case at the bottom
- FEATURE: padstack label smarter print: in case of full overlap of a bottom and top "pad", arrange other-side labels to avoid overlaps [report: al3x]
- FEATURE: preferences: grid list edit on the sizes tab
- improve locking:
	- FEATURE: consider a move-only lock?
	- BUG: when thermal and some other operations are applied on a locked element, indicate it
- BUG: rubberband_orig: draw a 90 deg arc, a 45 deg line that ends in the endpoints of the arc; enable rubber band, move the arc: only one endpoint of the line is moved [fixing:Ade]
- FEATURE: "save as" dialog: there should be an "auto" or "guess by extension" option in the save dialog format
- CLEANUP: insert drag&drop strangeness (mainline too):
	insert should just insert a new point and stop there, not starting a drag&drop
	move; the new point should be marked somehow (e.g. green-find one half of the
	object, like arc split does) lines can be inserted mostly only in all-dir-line
	which is strange
- FEATURE: display net names on pins, vias (and maybe tracks?) when zoomed in enough
- FEATURE: DRC should warn for thin poly hair
- CLEANUP: win32 port {large}
	- clean up central Makefile.in rules:
		- remove cat, sed, grep where possible, use scconfig instead
- BUG: arc bug: draw an arc with one end out of the drawing area; it will be jumpy and can not be placed properly
	-> AttachForCopy() calls SetCrosshairRange() that then sets crosshair max* which
	- similar with lines: bug_files/dwgarea.lht; grabbing the lines for move will force them to fall within the drawing area [report: pstuge]
	limits the arc to move freely. Problem: this is not arc-specific, this happens with any buffer copy! going for no-design-limit is probably better
	- similar issue: can't move outline lines to coord 0;0 because of line width.[report: pstuge]
- FEATURE: while drawing a line, the temporary outline should reflect the layer color
- CLEANUP: unify gui invocation options: pcb-rnd --help gtk_[gdk|gl] and pcb-rnd --help lesstif both show and use different input methods [report:miloh]
- FEATURE: trace length calculator:
	- click a line or arc or via
	- start a search in two directions mapping lines, arcs and vias connected (green-highlight them, marking them found)
	- stop at the first junction (anywhere where more than 2 objects are connected)
	- stop at polygons
	- display the number of vias and net trace length along the found objects
- CLEANUP: core lib splitup:
	- gsch2pcb: generalize plugin/buildin loading for external tools, check if gsch2pcb can work from plugins
- FEATURE: revise the importer; http://repo.hu/cgi-bin/pool.cgi?cmd=show&node=make_import ; should work without an existing file [report: TwisteR]
