subtitles proof of concept (Hacky)

Need some answers from lead developers to questions such as:

"how to fit this in with the existing yaml?"
"to what extent should messages be reported in text? And should there be groups of voices to enable?"
"make sure announcements like the commando laugh, cloak activate and superpower warnings are narrated."
"is this to be shared with the existing chat dialog?"

Added some random subtitles to the RA mod to show.
![arf](https://cloud.githubusercontent.com/assets/1812087/4100239/fa7c305e-3089-11e4-9786-811858e5b487.jpg)