copy glut*.dll next to executable using cmake postbuild step

re-add CollisionInterfaceDemo to cmake

Demos/CollisionInterfaceDemo/main.cpp

@@ -0,0 +1,15 @@
+
+#include "CollisionInterfaceDemo.h"
+#include "GlutStuff.h"
+#include "btBulletDynamicsCommon.h"
+
+int main(int argc,char** argv)
+{
+	CollisionInterfaceDemo* collisionInterfaceDemo = new CollisionInterfaceDemo();
+
+	collisionInterfaceDemo->initPhysics();
+
+	collisionInterfaceDemo->clientResetScene();
+
+	return glutmain(argc, argv,screenWidth,screenHeight,"Collision Interface Demo",collisionInterfaceDemo);
+}