Adding an example of creating a Cell that handles events. Also updated the existing Cell example to use SafeHtmlTemplates, which is a better alternative to manually appending HTML strings.  Add a comment in the Cell interface explaining that we may modify the Cell API in the future, and users should always extend AbstractCell.

Review by: rjrjr@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@10566 8db76d5a-ed1c-0410-87a9-c151d255dfc7
4 files changed