add broadphase demo (empty skeleton)

demo/gpudemo/broadphase/PairBench.cpp

@@ -0,0 +1,23 @@
+#include "PairBench.h"
+#include "BulletCommon/btQuickprof.h"
+
+void	PairBench::initPhysics(const ConstructionInfo& ci)
+{
+	CProfileManager::CleanupMemory();
+}
+
+void	PairBench::exitPhysics()
+{
+	
+}
+
+
+void PairBench::renderScene()
+{
+	
+}
+
+void PairBench::clientMoveAndDisplay()
+{
+	
+}