Improvements to i18n:
- Renamed apps.start to apps.messages.
- apps/*/template.soy files call apps.start.
- Prepended app name to message span ids.
- Renamed Puzzle.helpOk to Apps.dialogOk.
Generated .js files will be added before committing.
Also fixed some old jslint errors and bug with Maze.restTooltip.

R=neil.fraser@gmail.com

Review URL: https://codereview.appspot.com/12808043

git-svn-id: http://blockly.googlecode.com/svn/trunk@1207 c400ca83-b69d-9dd7-9705-49c6b8615e23