This patch adds the following R/W properties and method to KX_GameObject:
- linearDamping -- get/set linear damping
- angluarDamping -- get/set angular damping
- setDamping(linear, angular) -- set both simultaneously
These allow runtime changes to the same properties that are accessible at design time in Blender's UI via game.damping and game.rotation_damping. The names of the properties were chosen to mirror the internal names of the BGE physics engine, as these are (AFAIK) also the commonly used names in physics literature.