Adds WindowScrollListener support to the Window.  This patch also moves the initHandlers method out of the *Template.js files and into Window, reducing the size of the nocache files by 1.5k.  The Window class now injects the initWindowHandlers method onto the outer window as needed, then removes it immediately.

Patch by: jlabanca, ecc
Review by: jgw
Issue: 639



git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@3552 8db76d5a-ed1c-0410-87a9-c151d255dfc7
8 files changed