Update the codelab to trigger exceptions and make the section on triggering server
and shared logging more clear. Also a few changes to ensure that disabling logging
works correctly in the codelab, and a static function that can be used (even in
development mode) to see if logging is enabled.

Review by: fredsa@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@8345 8db76d5a-ed1c-0410-87a9-c151d255dfc7
3 files changed