v28.2

Sébastiaan Versteeg

@sversteeg

6019ae5c · Merge branch '956-957improve-logging' into 'master' · Nov 13, 2019

Release: v28.2

##  :ambulance: concrexit v28.2

## Errors resolved 
- Add root logging configuration and improve format (!1409)
- Add mailinglists for newsletter receivers and refactor mailinglists services (!1410)