Remove affiliation field in author and editor objects (@sschuepbach)

Define default running environment (Python) (@sschuepbach)

Don't clear cache after each processed line (@sschuepbach)

Read file directory instead of single files (@sschuepbach)

Merge remote-tracking branch 'origin/master' (@sschuepbach)

Load Crossref data into Elasticsearch (@sschuepbach)

Add a hint for use the setup with jwilder/nginx-proxy (@tobinski)