Added Added friction, angularVelocityFactor and ApplyForce for the RigidBody
Merge pull request #989 from small-jeeper/Physic

Added Added friction, angularVelocityFactor and ApplyForce for the RigidBody
Added some tracing options for buffer usage.
Corrected failure to stop engine threads when saving the game, resulting in leaking of chunk vbos.
Merge branch 'develop' of git@github.com:MovingBlocks/Terasology.git into develop
Fix for unit test.
Added keyboard bind for toggle view distance, moved away from movement keys to HOME key by default.
Adding display names.