Release 2: Box2D Upgrade

• FileSystem browser issue fixed on Mac
• GeometrySkin & TextureComponent performance increase (validation cycle bug fix)
• Design time performance increase (view grid disabled at smaller grid sizes/zooms)
• Fixed editor selection issues relating to Connections, Pins & Polygons
• Fixed Box2D geometry rotation issue
• Added Box2D DebugDrawProcess Overlay
• Separated & improved motorbike game demo
• fixed validateDisplay for Skins