Version 0.6.6

✔️ option for instant turning
✔️ option for instant movement
✔️ airship will fly over fences and trees with X passage without changing elevation.
✔️ Vehicles now behave correctly in 1st person
✔️ fix skybox not loading immediately on mz3d
✔️ when using skybox plugin command, providing a default value will clear existing skybox settings.
✔️ add skybox command for MZ's new plugin command gui
✔️ If no file extension is used for skybox image, png will be used.
✔️ make removing the skybox persist after saving and loading
✔️ fix flipped obj models (use flip:true to get the old behavior)