Add a statistical profiler. Also applied a bugfix b3Profiler.

- This is a compact hierarchical profiler which also stores node statistics
- Might need to use a hash-table to lookup statistic for node because each frame trees are build

examples/testbed/framework/profiler.h

@@ -62,8 +62,6 @@ public:
 	// Get the root profiler node.
 	ProfilerNode* GetRoot() { return m_root; }
 private:
-	friend class ProfilerRecorder;
-	
 	ProfilerNode* CreateNode();
 	void DestroyNode(ProfilerNode* node);