added gpudemo

demo/donttouch/btCpuDynamicsWorld.cpp

@@ -0,0 +1,17 @@
+#include "btCpuDynamicsWorld.h"
+
+#include "btBulletDynamicsCommon.h"
+
+btCpuDynamicsWorld::btCpuDynamicsWorld()
+	:btDiscreteDynamicsWorld(
+			new btCollisionDispatcher(new btDefaultCollisionConfiguration()),
+			new btDbvtBroadphase(),new btSequentialImpulseConstraintSolver(),
+			new btDefaultCollisionConfiguration()//todo: remove this!
+			)
+{
+}
+	
+btCpuDynamicsWorld::~btCpuDynamicsWorld()
+{
+	
+}