Better error message when a module needs to be recompiled.

  was: This module needs to be (re)compiled, please run a compile or use the Compile/Browse button in hosted mode
  now: GWT module 'your.ModuleName' needs to be (re)compiled, please run a compile or use the Compile/Browse button in hosted mode

Review by: bobv


git-svn-id: https://google-web-toolkit.googlecode.com/svn/releases/1.6@4315 8db76d5a-ed1c-0410-87a9-c151d255dfc7