Conversion to binary image seems to be working ok
Made some progress on the object tracking.  Added auto background detection.
Seems to work pretty well with adjusting to different lighting conditions
on the fly.  Picking up a bit of noise, so will probably need to implement
a "find the biggest contours" function
Resolved

Merge branch 'master' of github.com:montaguk/crossfire

Conflicts:
	vision/edge_detect.cpp