pluggable Reporters

[cvrebert]

Pull requests welcome.

[zacechola]

I was noodling around with this a bit this afternoon. My thought would be to do something similar to jshint here. Break out the reporter in the cli and then allow the reporter JS to be passed in as an option. Not entirely sure what that might look like on the browserfy side, tho.

I personally like this one because it could simplify the grunt task from being a grunt-specific copy of the cli.js to merely a wrapper of cli.js, where I could pass a custom reporter.