Create a JSON Report

[chriswininger]

Hello Jim

We discussed the possibility of a JSON report recently on a call. I don't actually have your e-mail, but I managed to crank this out.

I figured I'd notify you via an issue request along with this PR: https://github.com/jimbethancourt/RefactorFirst/pull/37

Let me know if this is useful or if there's anything I can do to improve it.

Thanks much.