fixed a preliminary error for 0 feature contours

also commented out some print statements.
fix for when contour doesn't appear in both images

This answers my question from a few commits back
trivial: iteration updates
invalid memory error fixed
trivial: spelling correction *facepalm*
debugging commit.
trivial - flipping of indices
reworked pit smoothing and how the buffer is calculated
Merge branch 'multi_driver'

Conflicts:
	OpenSURF/src/surf.cpp