Added script dedup_json.py, used to clean up merged json files.
Made minor improvements to existing scripts.

R=neil.fraser@gmail.com

Review URL: https://codereview.appspot.com/12780043

git-svn-id: http://blockly.googlecode.com/svn/trunk@1202 c400ca83-b69d-9dd7-9705-49c6b8615e23
Abstract dialogs (from Puzzle help) into apps/common.  Convert feedback alert in Puzzle to a dialog (adding a status animation).  Convert code alerts to dialogs in all apps.  Add syntax highlighting to code dialogs, Code app, and Block Factory.  Fix layout in Block Factory.  Add notranslate to pages.  Factor out messagos into separate templates.

R=spertus@google.com

Review URL: https://codereview.appspot.com/12765044

git-svn-id: http://blockly.googlecode.com/svn/trunk@1203 c400ca83-b69d-9dd7-9705-49c6b8615e23