Bug 884032: Remove the testing/jetpack directory. r=gps
Bug 833386 - Tests for HTMLTrackElement and TextTrack* DOM objects r=rillian,cpearce

This patch is primarily the work of Marcus Saad (msaad) and Jordan
Raffoul (jbraffoul) at Seneca College.
Bug 880734 - Assert that we're the current FB in FB funcs, and bind the correct FB on Mesa. - r=bjacob