initial implementation of state logging.

see examples/pybullet/logMinitaur.py for example. Other state logging will include general robot states and VR controllers state.

examples/SharedMemory/PhysicsServerCommandProcessor.h

@@ -46,6 +46,7 @@ protected:
 	int createBodyInfoStream(int bodyUniqueId, char* bufferServerToClient, int bufferSizeInBytes);
 	void deleteCachedInverseDynamicsBodies();
 	void deleteCachedInverseKinematicsBodies();
+	void deleteStateLoggers();
 
 public:
 	PhysicsServerCommandProcessor();