2.0

Features
*  All registration parameters have auto defaults
*  Dataclasp for scripting
*  Multi-value registration
*  Overlap fraction penalty for native registration methods
*  Full support for irregular slice spacing

Documentation
*  Registration tutorial based on NA-MIC case library
*  MABS tutorial

Backward incompatible changes
*  Remove short options "-F"
*  DRR/FDK uses IEC coordinates

1.6.0

*  B-spline auto-parameters (partly done)
**  Needs improved subsampling framework (done)
*  B-spline direction cosines (done)
*  B-spline regularization (done)
*  B-spline ROI (done)
*  DCMTK support (done)
*  Large image support (done)
*  plastimatch average (done)
*  plastimatch dice (done)
*  plastimatch dmap (done)
*  plastimatch threshold (done)

Wishlist

*  Autolabel (la,tsv1,tsv2)
*  Copy-free conversion between itk and native volumes
*  CUDA demons
** (What is wrong with current one?)
*  Extend B-spline loop template to other flavors
*  RTK wrapping
*  DRR/FDK dicom
*  Evaluate native vs itk jacobian
*  IEC patient coordinate system
*  MSVC express multicore strategy (done -- use MSVC 2013)
*  Native rigid registration
*  Normalized MI
*  patient mask to support MRI
*  plastimatch gradient magnitude
*  Proton/photon/electron dose calculation
** Add multi-beam to command file
** Remove duplication of code for photons
*  RTPLAN support
*  Standalone GUI
*  Superbuild

Cleanup

*  Better handling of ??_parms class
*  Rename volume::offset -> volume::origin
*  Remove Pstring
*  Move vf-invert, landmark-warp, drr, fdk into plastimatch executable
