Fixes start blocks and provides better XML parsing errors.
Merge pull request #97 from brandonbloom/xml-errors

Fixes start blocks and provides better XML parsing errors.
Fixed most jshint warnings
Updated Maze 2 Level 2 so the mouse is facing south.
Merge pull request #99 from nanan9177/maze_test

Updated Maze 2 Level 2 so the mouse is facing south.
Merge pull request #98 from brandonbloom/jshint

Fixed most jshint warnings
Changed the empty block message.
Merge pull request #101 from nanan9177/maze_test

Changed the empty block message.
Switched namespace of Blocks from Language to Blocks to accord with Blockly core changes.
Added blockly_debug, a concatted but unminified version of blockly.
Copied new dependencies from blockly-core.
en.js replaces en_compressed.js.
Delete unnecessary language file