improved for inserting profile timings from Python, to analyzer performance of pybullet programs.

See examples/pybullet/examples/profileTiming.py for an example. Note that python and c++ is properly interleaved.
Open a timings with a name, close the timing without a name. Note that timings can be recursive, added/popped as a stack.

examples/SharedMemory/SharedMemoryCommands.h

@@ -627,6 +627,7 @@ struct b3Profile
 {
 	char m_name[MAX_FILENAME_LENGTH];
 	int m_durationInMicroSeconds;
+	int m_type;
 };
 
 struct SdfLoadedArgs