Migrate tests to from Jaribu to Mocha

[DougReeder]

https://github.com/silverbucket/jaribu/blob/master/README.md

[raucao]

Anyone interested in contributing, see #1193, where I started implementing this a while back.

[silverbucket]

I would like to help out, just don't know if I realistically have the time right now. What about getting #1193 merged so we can pick at it as we go?

Any new tests could be implemented with the new framework, and as old code need to be refactored they can be rewritten as well. That's how I've been doing it with Sockethub, and even though there are still a few remaining Jaribu tests, most of the codebase is covered with mocha and chai now.