Add support for the Brightscript language

Brightscript is the language used to create [Roku applications.](http://www.roku.com/developer)

Here are some examples of implemented brightscript: 
https://github.com/computmaxer/roku-hdhomerun
https://github.com/plexinc/roku-client-public

The included sample is straight out of the samples included with the Roku SDK.