First round of changes to implement WAR design.
http://code.google.com/p/google-web-toolkit/wiki/WAR_Design_1_6

Review by: bobv


git-svn-id: https://google-web-toolkit.googlecode.com/svn/releases/1.6@4262 8db76d5a-ed1c-0410-87a9-c151d255dfc7