fixed issue where too many valid_contours were being detected with images
that only had straight lines.
Create .gitignore
Changed parameters of functions that were cv::Mat to cv::Mat& references
minor changes
Made changes to motor_movement to incorporate brand new ROBOT MODEL OBJECT. Model object consists of arm movement methods such as penUp, penDown, methods to move to each corner, etc. The Robot.h and Robot.cpp files MUST BE PUT IN YOUR SKETCHBOOK LIBRARY TO FUNCTION PROPERLY. All robot functionality from here on out SHOULD come from this class.
merging with sam Merge branch 'master' of https://github.com/shamor/Senior-Design-I
Merge branch 'master' of https://github.com/shamor/Senior-Design-I

Conflicts:
	Makefile
	black.png
	src/main.cpp
	src/vertexSearch.cpp
Merge branch 'master' of https://github.com/sbonner1/Senior-Design-I
Minor fixes for presentation.
Merged with Josh.