Improved CharacterDemo/KinematicCharacterController, dynamic objects will bounce off.

Don't create a todo list for doxygen by default (the chaotic todo's would confuse most developers)
Improve support for small objects, by having dynamic contact breaking thresholds. Still needs small internal timestep and some GJK improvements.

src/BulletCollision/BroadphaseCollision/btBroadphaseProxy.h

@@ -92,6 +92,7 @@ BT_DECLARE_ALIGNED_ALLOCATOR();
 	        KinematicFilter = 4,
 	        DebrisFilter = 8,
 			SensorTrigger = 16,
+			CharacterFilter = 32,
 	        AllFilter = -1 //all bits sets: DefaultFilter | StaticFilter | KinematicFilter | DebrisFilter | SensorTrigger
 	};