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

re-add CollisionInterfaceDemo to cmake

Demos/Box2dDemo/CMakeLists.txt

@@ -25,6 +25,21 @@ IF (USE_GLUT)
 		Box2dDemo.cpp
 		Box2dDemo.h
 	)
+	IF (WIN32)
+		IF (CMAKE_CL_64)
+			ADD_CUSTOM_COMMAND(
+				TARGET AppBox2dDemo
+				POST_BUILD
+				COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different ${BULLET_PHYSICS_SOURCE_DIR}/glut64.dll ${CMAKE_CURRENT_BINARY_DIR}
+			)
+		ELSE(CMAKE_CL_64)
+			ADD_CUSTOM_COMMAND(
+				TARGET AppBox2dDemo
+				POST_BUILD
+				COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different ${BULLET_PHYSICS_SOURCE_DIR}/GLUT32.DLL ${CMAKE_CURRENT_BINARY_DIR}
+			)
+		ENDIF(CMAKE_CL_64)
+	ENDIF(WIN32)
 ELSE (USE_GLUT)
 LINK_LIBRARIES(
 	OpenGLSupport  BulletDynamics  BulletCollision LinearMath  ${OPENGL_gl_LIBRARY} ${OPENGL_glu_LIBRARY}