Prepare first batch of core Blockly messages for translatewiki.
Made minor improvements to js_to_json.py.

R=neil.fraser@gmail.com

Review URL: https://codereview.appspot.com/13345047

git-svn-id: http://blockly.googlecode.com/svn/trunk@1337 c400ca83-b69d-9dd7-9705-49c6b8615e23
Change mutator icon to a star.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1338 c400ca83-b69d-9dd7-9705-49c6b8615e23
Add headers to language and generators so that they may be loaded and compiled with Closure.

Review URL: https://codereview.appspot.com/13333049

git-svn-id: http://blockly.googlecode.com/svn/trunk@1339 c400ca83-b69d-9dd7-9705-49c6b8615e23
Compiled files from previous CL.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1340 c400ca83-b69d-9dd7-9705-49c6b8615e23