Tutorial revamp

I changed the layout of the tutorial (the route player has to go through, and updated the positions and content of the prompts). Now it's more linear and should be less confusing. The layout of the ship itself stayed almost the same.

Some other tweaks in this update

• Doors connected to a room become invisible when exiting that room, and for a (very short) moment you see through them. Fixed by adding a black plane.

• Screen becomes black and white on death

• Lantern stayed lit when falling in water with it

• Stairs changed to be less of a pain for player (now the player character doesn't use any special animations in them, the NPCs still do)

• Map view adjustments