Switch from a Halloween footer to a winter theme

Thought you might be interested in changing seasons :smile_cat: 

* Made the footer background white to represent snow and winter.
* Now using olive links, buttons, and tagline to represent evergreen trees.
* Author related links are changed to gray for a more winter-y feel, as well.

![v6tupmu7wikrax8vk9rbbe9lcbl369pmmwcmmguc6ko](https://cloud.githubusercontent.com/assets/1424573/5444389/44c0324c-8467-11e4-8420-9585946928e8.png)