Move encoding to own files that can be included
Add url for linking to detail page to event encoding
Add color coding for category and track to event encoding
Introduce room hierarchy (building + room)

Adapt filenames, references and URLs
Adapt settings keys
Adapt translations
Fix wrong settings keys in wall view

Add views
Add templates
Add urls
Add translations
Add three corresponding settings to central settings file
Minor: Fix typo in plan_akslot