Minor Cleanup

# What's New?

There have been a bunch of tiny things that I have not had time to fix. Today, I went back and cleaned them up:

 * Remove old comments
 * Remove MongoidSearch as a project dependency
 * Removed fixed / invalid `TODO`s
 * Fix goofy `secret_key_base` setup in dev env.
 * (Hopefully) get coveralls to show our true coverage percentage. Please excuse the noise as I work on settings.

# What's Next?

 * Custom `Unauthorized` exception that we can raise inside mutations. That way, we don't need to call unauthorized actions malformed requests like we are doing right now.