finished the corner-finder

I just finished my assigned part of the program for idt, the bit that actually scans the image and finds the corners between windows. It's pretty good and effective, it scans from the bottom up and left to right for windows, and although it isn't perfect, windows would have to be positioned just perfectly in the right spots to trick it. It is, unfortunately, a bit slow, but i don't believe the competition grades us based on execution time.