1.6.0

*  B-spline auto-parameters
*  B-spline direction cosines
*  B-spline regularization (done)
*  B-spline ROI
*  DCMTK support
*  Irregular slice spacing
*  Large image support (done)
*  plastimatch average
*  plastimatch dice
*  plastimatch dmap
*  plastimatch threshold

Unspecified future release

*  Autolabel (la,tsv1,tsv2)
*  CUDA demons
*  DRR/FDK dicom
*  Native translation registration
*  Native rigid registration
*  Normalized MI
*  Proton/photon/electron dose calculation
*  RTOG support
*  RTPLAN support
*  Standalone GUI
