reorder files, in preparation for Bullet 3 -> Bullet 2 merge

Demos3/donttouch/b3CpuDynamicsWorld.h

@@ -0,0 +1,24 @@
+
+#ifndef B3_CPU_DYNAMICS_WORLD_H
+#define B3_CPU_DYNAMICS_WORLD_H
+
+class b3DefaultCollisionConfiguration;
+class b3CollisionDispatcher;
+struct b3DynamicBvhBroadphase;
+class b3SequentialImpulseConstraintSolver;
+
+#include "BulletDynamics/Dynamics/b3DiscreteDynamicsWorld.h"
+
+class b3CpuDynamicsWorld : public b3DiscreteDynamicsWorld
+{
+	
+public:
+	
+	b3CpuDynamicsWorld();
+	
+	virtual ~b3CpuDynamicsWorld();
+
+
+};
+
+#endif //B3_CPU_DYNAMICS_WORLD_H