(1) Dormant bounciness API (2) playground redraw default is now a config
(1) Dormant bounciness API (2) playground redraw default is now a config

1. There is now an API for bounciness in Physical Game Objects. It
   is currently dormant; it doesn't do anything yet.

2. Playgrounds used to default to "true" in their redraw in hard code.
   This is no longer -- it's now an overwriteable config variable.

EvanHahn/Fiesta.js