Add $entry magic function to guarantee correct entry and exit of GWT code from ex

Patch by: bobv
Review by: scottb, bruce, rjrjr, jgw

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@6400 8db76d5a-ed1c-0410-87a9-c151d255dfc7
6 files changed