Started on translations
First i18n (de, en) for user sessions/registration
Persisted locale preferences
Further translations for documents-section
Further translations implemented into the views
Added the world-flags gem and require it
Fixed some translations within the layout and documents
Scaffolded new model for paragraphs
Removed user-based option for preferred locales.
Should be saved as cookie, I guess.
Creating single-table inheritance for section models
Replaces single inheritance in sections with no inheritance at all
=> Sections are not inherited!
Implemented an alternative (better) naming for the sections