Prepare turtle app for multiple languages.

git-svn-id: http://blockly.googlecode.com/svn/trunk@645 c400ca83-b69d-9dd7-9705-49c6b8615e23
Prepare graph app for multiple languages.

git-svn-id: http://blockly.googlecode.com/svn/trunk@646 c400ca83-b69d-9dd7-9705-49c6b8615e23
Prepare code app for multiple languages.

git-svn-id: http://blockly.googlecode.com/svn/trunk@647 c400ca83-b69d-9dd7-9705-49c6b8615e23