Trim down Google's Apache licenses in compiled code.

R=markf@google.com

Review URL: https://codereview.appspot.com/58770043

git-svn-id: http://blockly.googlecode.com/svn/trunk@1626 c400ca83-b69d-9dd7-9705-49c6b8615e23
Trivial comment changes.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1627 c400ca83-b69d-9dd7-9705-49c6b8615e23