SparseView.h: Minor comment fix
Point2Grid: Treat a corner case
RPCModel: Use invalid camera pixel
doc: Condense conf example to render properly
Disable hole-filling by default
Change the places where messages are printed
Common: Minor API changes
Hole-filling and automatic outlier removal

Code to discard outliers

point2dem: Automated outlier removal
Tools: geodiff now only operates on the union between inputs.
Settings: Made options code easier to read
Code cleanup