orthoproject: Minor robustification
Documentation: Update for seed-mode 2 and some clarifications
StereoSessionIsis: Minor comment rewording
Sessions: More specific debug output stream
Stereo: Compute D_sub based on DEM settings and initial work
DG: Remove duplicate code
DG: Minor comment removal
stereo_tri: use smart pointers
stereo: Low-res disparity: Use tiling
D_sub from DEM: Implement faster LM solver by seeking over ray
TestStereoSessionDG: Minor adjustment
LinescanDGModel: Use uncorrected as initial guess
stereo: cleanup in low-res disparity code
RPCModel: Rm caching of initial guess for thread safety
stereo_corr: Add disparity spread when computing disparity from DEM
stereo:User safety check applies for RPC as well. Other cleanup
stereo: Flag to do low-res disparity only
streo: D_sub from DEM: Rasterize portion of DEM in memory for speed
stereo: Finish implementing and cleanup of DEM disparity
tools: Add dg_mosaic

This is a script to composite digital globe tiles together and
generate a composited XML.