misc minor fixes & rubocop style

* rubocop -a again (it gets stuck in the page model?)
* gem dependency fix
* regenerated spec_helper and added kuhsaft-specifics
* add a few translations
* available_locales will be reset before each spec
gemspec fix
ignore seeds style
correct indentation
use doc format for rspec
use nyan cat formatter
add / modify translations
Merge pull request #216 from screenconcept/features/195_translatios_and_misc_fixes

misc minor fixes & rubocop style