Contrast, expanded footer

Next iteration of footer. Adds a dark contrast colour to the footer to separate it off the page and also to give focus to the important links in there, such as who made this site. Also makes a bigger deal of the other projects, providing a small intro to each of them. Structure of upper 'main' section could be clearer on small screens.

![screen shot 2014-10-16 at 1 35 10 pm](https://cloud.githubusercontent.com/assets/1239550/4656788/bb7e0b16-54dd-11e4-93ef-9219ad5af7e3.png)
![screen shot 2014-10-16 at 1 35 22 pm](https://cloud.githubusercontent.com/assets/1239550/4656789/bd9a17fa-54dd-11e4-9ea6-63a19ff80fae.png)
![screen shot 2014-10-16 at 1 35 34 pm](https://cloud.githubusercontent.com/assets/1239550/4656790/c194da02-54dd-11e4-980b-1de1f601b4e8.png)
![screen shot 2014-10-16 at 1 35 44 pm](https://cloud.githubusercontent.com/assets/1239550/4656792/d9520c82-54dd-11e4-827d-f718f891db8d.png)
![screen shot 2014-10-16 at 1 35 55 pm](https://cloud.githubusercontent.com/assets/1239550/4656793/dd5bcfac-54dd-11e4-9b18-13088ceba26a.png)

closes #756 
closes #753