Removed code that cleared the proxy container prior to populating it in implemented world objects.
Removed code where I was attempting to set an individual scale on the body of a collidable proxy that was separate from the collision shape scale.  This attempt failed and will have to be viewed as a limitation of bullet for the time being.  If we want different scaling on the same shape, make multiple instances of that shape.
Merge branch 'master' of https://github.com/BlackToppStudios/Mezzanine