Fixed tests not loading Ecrire and fixtures

Two errors are fixed here:

- Ecrire wouldn't be able to load properly because
  Ecrire::Railtie.configured? is asked when Railtie is loaded as a
  class. This means that maybe I will have to change the way I include
  the modules in Railtie. An idea ->
  http://stackoverflow.com/questions/4943055/ruby-use-module-include-in-instance-method-of-class

- The fixtures were not loaded because it looks for a relative path to
  Rails.root. since the root is pointing at the default theme, it
  wouldn't play nice. This is a normal method so that change is good