Fixing Physics release build directory
Merge branch 'master' of https://github.com/mono/CocosSharp
Adding elasticity and friction
Adding more setters to body
Fix on collision. CCPhysicsContactInfo cannot be null
Some renaming methods
Collision fix, bodies cannot be null!
Space is now a property
Draw is called on every Update and its not necessary to call it on the example
Fixed Map property. Now reacts like a Singleton instance.
Normalizing some methods
Space now is a property
Some normalize.
Space is a property