Features/3089 country specific locale

@effkay @iphilgood @alexanderadam @donaier 
- add functionality to add country-specific language
- make sure after running `rails g kuhsaft:translations:add de-CH` that the generated migration also adds a `page_title_de_ch` filed in the database! (this I fixed in this open Pull-Request https://github.com/screenconcept/kuhsaft/pull/205)
- maybe some of u find something that i forgot
- thx for reviewing