WIP: 1.2 release

Generator that ads an admin model and uses it for authentication in the cms backend

- [ ] missing in env configs when adding devise: config.action_mailer.default_url_options = { :host => 'localhost:3000' }
- [x] only add before filter into shoestrap basecontroller when kuhsaft is not used
- [x] fix identation of kuhsaft initializer injection
- [x] add rails-i18n gem
- [x] navigation.title vs. navigation_title in locales
- [x] get rid of duplication in I18n yml files (singular_name etc. vs one/other definitions)
- [x] dynamically set attributes for I18n files