Allow to link the DX11ClothDemo against the 64bit DirectX SDK for x64 builds

Fix memory leaks in btBulletFile and btParallelConstraintSolver (and added some additional profile timers)

Extras/Serialize/BulletWorldImporter/btBulletWorldImporter.h

@@ -96,7 +96,7 @@ public:
 
 	///delete all memory collision shapes, rigid bodies, constraints etc. allocated during the load.
 	///make sure you don't use the dynamics world containing objects after you call this method
-	void deleteAllData();
+	virtual void deleteAllData();
 
 	bool	loadFile(const char* fileName);