updated translations #118
  - renamed headlines, adjusted German translation
  - adjusted capitalization all over the place, generally only the first word of a phrase should be capitalized
  - fixed a few translation mistakes in German and wording mistakes in English
- added translation for FAQs #117
  * FAQs now have a "locale" attribute, added migration
  * only FAQs for the current locale are shown
  * FAQs are created with the current locale
  * added translation for current FAQs to German