Local homography, first part
stereo.cc: User safety check for local homography
stereo_mpi: Support local homography
Local homography
Rename LocalDisparity to LocalHomography
Rename LocalDisparity to LocalHomography
Rename LocalDisparity --> LocalHomography
LocalHomography: Multi-threading, but for now turned off
StereoSessionDG: Minor formatting
Add timing statements in places
stereo_pprc: Minor touchup