* sync with fireflies of upstream original mod and from minenux
* Add vessels group to firefly vessel
* Detect creative mode and creative privilegies, using creative mod
* Detect ethereal mod and provide more biomes of place
* backported fc4ab2538d
* adapt sync ee13c9f46a
* the mt5 game already has a improved version of fireflies with timer nodes
that hide the fireflies at day, but required a more upgraded engine version
