added proposed approach for cunningham chain candidate generation
Merge remote-tracking branch 'origin/edge_detection'

Merging in Kris's changes to the project proposal.
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'

Merging upstream changes into the master branch.
Added more info about the hardware grayscale coprocessor to the MP-3 writeup. Also create a dataflow diagram for the hardware grayscale coprocessor. Closes #18