ApiController with API style auth

require_login is require_token for the api controller

It also skips the verify_authenticity_token before filter.
So all Subclasses of the ApiController will only support token auth.

Also made the V1::UsersController a bit more strict. Now way for admins to alter other users through the api. We don't support that yet so let's not allow it either.
send config files from ConfigsController