Scenes [MMD Stage] Rooftop club

1. Moved Post Magic plugin into a individual atom named 'Post Magic' for a cleaner view of the scene plugins tab
2. Added several music-interactive visual effects
3. Improved lighting performance

1.Added Skybox
2.Changed the texture of the stage for a better focus of the dancer
3. Removed Eosin's VRRender plugin on RenderCAM