Remove undocumented discard function from storage.  Code app's discard button now works offline.

git-svn-id: http://blockly.googlecode.com/svn/trunk@652 c400ca83-b69d-9dd7-9705-49c6b8615e23
Add missing title to turtle colour block.

git-svn-id: http://blockly.googlecode.com/svn/trunk@653 c400ca83-b69d-9dd7-9705-49c6b8615e23