Convert AutoBeans to use JSOs as their backing store with lazy reification of
values.
Use JsonSplittable in DevMode to avoid JSNI overhead.
Review at http://gwt-code-reviews.appspot.com/1407802
Patch by: bobv
Review by: rice


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@9955 8db76d5a-ed1c-0410-87a9-c151d255dfc7