Fix Super Dev Mode's code server to launch on localhost by default.
(There were comments about this but it wasn't actually true.)
Add -bindAddress option to override this. In particular, -bindAddress 0.0.0.0
restores previous behavior.

Review at http://gwt-code-reviews.appspot.com/1740803

Review by: acleung@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@11063 8db76d5a-ed1c-0410-87a9-c151d255dfc7