New Package: ChucK syntax

A direct port of the existing TextMate plugin. I plan to first improve syntax highlighting for now, and perhaps add additional `ChucK` features in the future.

[ChucK Language](chuck.cs.princeton.edu/)

Syntax highlighting example:

![Screen Shot 2013-04-06 at 2 35 27 PM](https://f.cloud.github.com/assets/102242/347665/da30ee7c-9ee8-11e2-907e-e37f0e494beb.png)

Thanks!