Showing hint blocks for only one required block in Maze.
Fixed required blocks in Maze 2.
Updated the readonly html also uses the same skin the students use.
Updated required blocks for Maze 2 Level 10.
? -> &
Merge branch 'maze_test' into mooc

Closes #82
Updated the required blocks for Maze 2 on Level 10 -- 18.
Merge pull request #85 from nanan9177/maze_test

Updated the required blocks for Maze 2 on Level 10 -- 18.
Remove link button
Remove dead storage logic
Merge pull request #84 from brandonbloom/remove-storage

Remove final traces of storage system.
Remove interstitials