New Sprites for AI HUD!

Provides a new sprite set for the AI HUD from MrSnapwalk!
![screenshot 2014-07-12 15 48 28](https://cloud.githubusercontent.com/assets/4955510/3562765/5b572d02-0a06-11e4-9fe0-aee23a19c0ba.png)
*This sprite set was originally made for NT station's AI, which has an additional button for a feature not present on tg. As such, they are somewhat smaller than the originals.