Adds a new set of AI status emotes.

The AI can now express being upset, angry and surprised through the status display (along with very happy, happy, neutral, etc.). 
Re-uses an existing Surprised emote, with attempt to improve it slightly.
Includes new upset and angry emotes.

![New faces](https://www.dropbox.com/s/pbhx1w5vcwa3g0h/NewAIEmotes.png?dl=1)