stereo_corr: Rename function for clarity
AntiAliasing.h: Get rid of warnings
book/stereodefault.tex: Spelling
docs/book/correlation.tex: reflect source code
Core/Common.cc: Write block image with no-data wrapper
InterestPointMatching.h: Pixels <= nodata are also nodata
orbitviz.cc: Using namespace boost causes conflicts with namespace vw over math
Treat properly nodata values
StereoSessionIsis: Setting invalid pixels to background