Added square class.
Updated makefile with square class.
Added square class to main.
Updated grid map.
Added 2nd constructor to square class.
Added grid to graphics class.
Fixed grid showing up round when calling reset.
Added start and end defines to defines.
Added position coodinates to square.
Added getters to square class.
Added getters for position to square class.
Added estimateDistance to square class.
Fixed scope error with EstimateDistance.