add some FactoryGirl configuration

- it makes it possible to call just `create(:my_factory)` instead of
the full thing
add authtentication mock for controller specs
add route loading for controller specs
add controller specs for Monologue::Admin::Post

This is currently failing locally for me, but I have no error output or
anything so pushing that in the hope that Travis will tell me something
different or new?

:pray:
Merge branch 'master' of github.com:jipiboily/monologue