Sarpy

Changed
More SICD validation corrections and improvements

Fixed
Fixes a bug in the create_kmx command line usage

Changed
- Improves sicd validation, including checks for values in GeoData.ImageCorners,
GeoData.ValidData, and ImageData.ValidData, check consistency between
RadarCollection.RcvChannels and ImageFormation.RcvChanProc, check consistency
between sicd structure and the appropriate NITF DES subheader values and Image
segment structure.
- Improves sidd validation by checking consistency between sidd structure and the
appropriate NITF DES subheader values and Image segment structure.

Fixed
Correct check if SICD Grid.Type is one of expected types

Added
Replaces the use of IOError with custom error, which simplifies and improves
error handling

Fixed
Bug fixes for NITF 2.0 implementation and NITF LUT usage

Fixed
Bug fixes for complex NITF construction, the Poly2DType shift method, the
BSQChipper, and NITF writing for an extra long/wide image