The winter update, part 2

![cold_weather_in_hell](https://cloud.githubusercontent.com/assets/7573912/5426651/bc7b8f48-8363-11e4-962a-a85dee5b8c3f.png)

https://dl.dropboxusercontent.com/u/33846352/dreamseeker%202014-12-13%2023-27-20-76.webm

Featuring a new random event, snowmen, snow, lots of snow based stuff and foliage, and of course christmas trees.

Changelog in progress.