Add CoffeeScript Implementaion to Master

Hi Brendan,
I am doing some heavy log file crunching using mawk. After 3 years, mawk is still fastest. But for curiosity I added a Node.js implementation (written in CoffeeScript). Please add it to the master. I also added a little run script that builds the binaries, runs all tests and cleans up the working dir.

PS: To run my code you need to install CoffeeScript:
1. Install Node.js
2. `npm install -g coffee-script`