Fix Toolbox API (issue 226).

git-svn-id: http://blockly.googlecode.com/svn/trunk@1724 c400ca83-b69d-9dd7-9705-49c6b8615e23
Improve flow of highlighting interpreted loops.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1725 c400ca83-b69d-9dd7-9705-49c6b8615e23