Merge pull request #67 from brandonbloom/fix-inters

Converts level interstitials to a data structure. Fixes them in maze
Changed the code in base.js for supporting the and-or logic in required blocks.
Updated Kare's data file (levels.js) to associate with the new required block standard.
Updated Turtle's data file (levels.js) to associate with the new required block standard.
Updated Maze's data file (levels.js) to associate with the new required block standard.
Merge pull request #68 from nanan9177/and_or_block_test

Added And or block test in Required Blocks
Merge pull request #70 from brandonbloom/skins

Skins
Updated blockly to svn revision 1328.
- Fixes interstitial condition.
Merge pull request #71 from tobyk100/update-blockly

Update blockly
Remove unused file
Remove LEVEL_ID
Remove old adp_maze.js
Eliminate BlocklyApps.PAGE and .LEVEL (except in Turtle)

Turtle seems like it depended on those settings, but they were never
configured, so it was bugged. Will fix soon.