Fixing issue 6206 (CellWidget#getValue() is never updated) and 6216 (CellWidget should implement IsEditor<C>).

Review at http://gwt-code-reviews.appspot.com/1400802/.

Issue: 6206, 6216
Patch by: tbroyer
Review by: jlabanca


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@9961 8db76d5a-ed1c-0410-87a9-c151d255dfc7
3 files changed