Merge pull request #29 from nanan9177/mooc

Removed all of the interstitials in Maze mode 2.
Maze starting direction
Karel starting direction
Merge pull request #32 from brandonbloom/start-dir

Start directions for Maze & Karel
Removed the redundant code in rending the maze (normalize).
Merge pull request #30 from nanan9177/mooc

Added obstacles for mouse and cheese in Maze
Merge remote-tracking branch 'code/mooc' into maze_feedback_m2