Change the SWF background color to black.
Change the SWF background color to black.

Fixes #102. I originally thought this would never be seen, but it's used
before the SWF is fully loaded (and the Stage3D context is grabbed).
Maybe it could be configurable later, but for now black is way better.

markknol/flambe,playedonline/flambe,playedonline/flambe,weilitao/flambe,Disar/flambe,aduros/flambe,weilitao/flambe,aduros/flambe,Disar/flambe,Disar/flambe,markknol/flambe,Disar/flambe,weilitao/flambe,mikedotalmond/flambe,mikedotalmond/flambe,aduros/flambe,markknol/flambe,playedonline/flambe,aduros/flambe,mikedotalmond/flambe,playedonline/flambe,mikedotalmond/flambe,weilitao/flambe