Changelog Version 0.9.7.9 Christmas Update

I want to give the game a nice winter wonder feeling for the christmas time, I changed some models to feel more like christmas and added a lot of new stuff!

Mechanics:

-New map: The South pole

-New Boss: Bad Santa

-New Spawner: Iglo
-New Enemy: Christmas Tree

-New Enemy: Snowman

-New Enemy variation: Snow wolf
-New Enemy variation: Polarbear
-Some trees now have christmas decoration
-New tree: Candy cane
-New Achievement: Merry X-Mas!

Balancing:

-You get now different exp for different biomes

Bugfixes:

-Some enemies did not spawn in the correct wave