dem_geoid: Minor
Sessions/DG/XML.cc: Must throw the right kind of exception to catch it later
InterestPointMatching.cc: Catch all exceptions
LinescanDGModel.h: Correct comment
XML: Check for non-zero poly coeffs for optical distortion
dg_mosaic.py: Handle a.b.xml and a.XML in addition to a.xml
stereo_mpi: Bug fix: Use deep copy for array
stereo_mpi: Create subproject dirs after pprc finished
I prefer gustatory perception in different context
XML.cc: Optical distortion degree can be negative
stereo: Produce lowres is no longer used in multiple places

Thus produce lowres should no longer be inside stereo.{cc,h}.
gitignore: Update to represent current state of affairs.
Common.h: Block write image with georef and nodata
dg_mosaic.py.in: Compensate for pitch diff
 - added an --output-prefix option
- check that DETORIGINX, PD, EPH, and ATT are same among xml files
stereo_corr: No need for interest points if DEM D_sub is used
InterestPointMatching: Print stats first, check matrix later
stereo_corr: Consolidate code
Sessions and InterestPointMatching: Consistent notation
stereo_corr: Local disparity
stereo_corr: Cleanup