Feature corridor beautification simple

[Diocruel]

Moved some responsibility from the MSTBasedLevelFactory related to corridor beautification to the new CorridorBeautification utility class.

Added a method that widens corridors if possible, so that the corridors are wider. Here is a shot of a small map with no duplicate chambers with the wider corridors Here is a shot of a large map with duplicate chambers with the wider corridors

Since corridor beautification that created noise to the corridors will take more time then expected, this simple fix will have to do for the gameplay testing tomorrow. I think the corridors look slightly boring like this, but it should be less nausea inducing to play the game.

[Taeir]

Looks good, we will see tomorrow (later today) if bigger corridors works better.

This can be merged.

[Geweldig]

Great, merging