Features/cleanup translations

hello @effkay  and @donaier 
this is my proposal for splitting translation yaml files into those that belong to models (-> they are put into /de/models) and those that belong to views (-> for that i introduced a new view template view.yml that is put into /de/views/cms). as i said its just a proposal, so lets start the discussion!

i also corrected the model.yml template so that singular table names are used instead of plural.

and i added translations to the controller template so that success messages on creating or updating are also translated (those translations i put into shoestrap.yml)

so what do you mean?