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

re-add CollisionInterfaceDemo to cmake

Demos/GimpactTestDemo/CMakeLists.txt

@@ -23,6 +23,21 @@ IF (USE_GLUT)
 			GimpactTestDemo.h
 			main.cpp
 	)
+	IF (WIN32)
+		IF (CMAKE_CL_64)
+			ADD_CUSTOM_COMMAND(
+				TARGET AppGimpactTestDemo
+				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 AppGimpactTestDemo
+				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)
 
 	INCLUDE_DIRECTORIES(