Squashed commit of clear_whiteboard:

commit a6cd09a2276a4728cd86d365130f73db34d57cf7
Author: Kyle Lahnakoski <klahnakoski@mozilla.com>
Date:   Fri Dec 20 18:09:20 2013 -0500

    remove '_example'

commit 09b693ec5b2bae117b862965ce306b23a4391710
Author: Kyle Lahnakoski <klahnakoski@mozilla.com>
Date:   Fri Dec 20 16:56:28 2013 -0500

    add sample settings

commit e200c7c843fc12f013ab4dcf25033c0d408b0377
Author: Kyle Lahnakoski <klahnakoski@mozilla.com>
Date:   Fri Dec 20 16:54:59 2013 -0500

    Finish work on leak checker

commit d31269ddf54ee402c8f8e3dd28649fa0507a6c38
Author: Kyle Lahnakoski <klahnakoski@mozilla.com>
Date:   Fri Dec 20 16:28:52 2013 -0500

    Completed the simple tests for leaks
    Add code to handle incremental etl on screened whiteboard
merge from clear_whiteboard