Fixes problem with datanucleus enhancement and Appengine deployment
- Migrated to Objectify
- Prevents gwt-dev.jar and gwt-user.jar from being deployed
- Prevents soycReport files from ending in the App Cache manifest
- Removed unused ant script file

Review at http://gwt-code-reviews.appspot.com/1521803


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@10532 8db76d5a-ed1c-0410-87a9-c151d255dfc7