Remove version from the public api of EntityProxy. Encodes the version value into a !version field on the client side. Patch by: amitmanjhi Review by: rjrjr (desk review) Review at http://gwt-code-reviews.appspot.com/878802 git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@8851 8db76d5a-ed1c-0410-87a9-c151d255dfc7