Restores "Introduces support for DataResource to UiBinder...",
now with IE-proof testing and tidier UiBinderParser

Review by: bobv
http://gwt-code-reviews.appspot.com/78808

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@6351 8db76d5a-ed1c-0410-87a9-c151d255dfc7