Monkeypatch adapters after rails initialization

The adapters code must be loaded after the full app stack, otherwise it may cause problems with other gems also interacting with translations. In particular, when used with the I18n_routing gem the app can't load because of an infinite loop. More info here:

http://www.cowboycoded.com/2010/08/02/hooking-in-your-rails-3-engine-or-railtie-initializer-in-the-right-place/