Adds emoji to OOC chat

Emoji has been added to OOC chat.

![emoji_demo](https://cloud.githubusercontent.com/assets/5211576/5459641/8ac3086e-852a-11e4-8ca3-c1f40ff2c29c.png)

The icons are from @emojidex, which is an effort to recreate all the emoji icons from apple and release them for free.
License included in PR, it can be found here: **https://www.emojidex.com/emojidex/emojidex_open_license**