Add a hack to allow coffee-script 1.7+

Created by: davewasmer

Coffeescript 1.7+ no longer automatically registers file extensions with Node. To do so, you must call .register():

coffeescript = require('coffee-script')
coffeescript.register()

I added a hack-ish solution: just check if the module being required is "coffee-script" (and >= v1.7.0), and if so, call register.

I realize this isn't the cleanest implementation, but thought I would start the issue with some kind of solution at least.