Various Icons (Some Numix'd, Some New)

Gnome Settings Default Applications
(not sure why it's cog, but it was. You might want to redo this at some point)
![cog2](https://cloud.githubusercontent.com/assets/5920259/2560067/4cec96cc-b7a3-11e3-854f-3ff890392bc8.png)

PDF Shuffler
(fix for #495 - open to criticism/changes/removal)
![shuffle](https://cloud.githubusercontent.com/assets/5920259/2560068/4cfaeff6-b7a3-11e3-9339-bb8ef5a1960a.png)

Jupiter Power Applet
![jupiter](https://cloud.githubusercontent.com/assets/5920259/2560069/4d07453a-b7a3-11e3-9ea2-f0abf6041aae.png)

Faster Than Light
(fix for #488 - woo spaceships!)
![shiip](https://cloud.githubusercontent.com/assets/5920259/2560070/4d08150a-b7a3-11e3-92aa-618c8ab790f9.png)

Team Fortress Classic
(the same as the original icon but yellow)
![tf2](https://cloud.githubusercontent.com/assets/5920259/2560071/4d08c630-b7a3-11e3-9aaa-0162e0f7b283.png)