Fixes Issue 4415 "uibinder Image class with resource attribute, removes styles
on that image", by adding a custom parser for Image.

http://code.google.com/p/google-web-toolkit/issues/detail?id=4415

Review by jgw
http://gwt-code-reviews.appspot.com/130811

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@7411 8db76d5a-ed1c-0410-87a9-c151d255dfc7