[WIP] Faraday

@jcwilk Another proof of concept...

I created a Faraday adapter using crystal lake. I'm not sure this is the best strategy for the longterm implementation, but it seems to work.
crystal_lake is more than an HTTP adapter replacement. It's an HTTP-less adapter. It let's us simulate a Rails HTTP request to another engine's API endpoint without leaving the Rails instance (no network connection needed.)