Removed the acquire event, renamed CREATE to PERSIST. Added javadoc as to when comments are fired. (Restored the event firing semantics to before Bob's patch.)

Patch by: amitmanjhi
Review by: rjrjr
Review at http://gwt-code-reviews.appspot.com/892802


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@8881 8db76d5a-ed1c-0410-87a9-c151d255dfc7