Adds several custom items/cyborg sprites.

Adds FearTheBlackout/Devildabeast's custom item.
![Preview](http://i.imgur.com/LA0Oj8g.png)
Approved here:
http://baystation12.net/forums/viewtopic.php?f=33&t=11592

Adds Searif's custom cyborg sprite.
![frosty](https://cloud.githubusercontent.com/assets/6371075/5036332/80d8fe08-6b44-11e4-8e3a-2dce5afd670a.png)
Approved here:
http://baystation12.net/forums/viewtopic.php?f=33&t=11522

Updates Matthew951's custom cyborg sprite.
(Too many sprites to show, the cyborg now has a floating animation)
Approved here:
http://baystation12.net/forums/viewtopic.php?f=56&t=11500

Adds Za_Redman's custom cyborg sprite.
![mord hat v2](https://cloud.githubusercontent.com/assets/6371075/5059935/2ba2f4d6-6cfa-11e4-9d81-c429c743db86.png)
Approved here:
http://baystation12.net/forums/viewtopic.php?f=33&t=11610