Initial commit; populate and draw initial board
Separate board rendering logic from board object
First stab at sliding values in 2d array "up"
Simple slide down in array value slider
Simple slide left and slide right
More up tests, de-dup 0 array code
Slide up works for simple, non-merge cases
Slide and merge up works
Slide left tests
Merge branch 'master' of github.com:nelsonwellswku/Ruby2048