InterestPointMatching: Use endl

Endl includes a flush so that the user can see the progress. Using newline isnt a sure fire why to make sure flush will happen. Endl is flush plus a newline.
stereo: Run commands in bin not libexec

If we call the executables in libexec, we lose our hijacks of
LD_LIBRRARY_PATH.
docs: Add DG, GeoEye, and Dawn example

This also adds 12 new pictures! Forgive me!
docs: Spelling error in DG map projection example.

I found this a mere minute after I committed. Sigh.
stereo_rfne: do subpixel rfnmt only in given window