Merge branch 'dev' into 'master'

.docs/api/python.md

.docs/examples/air.md

.docs/examples/covid-19.md

.docs/examples/influenza.md

.docs/examples/music.md

.docs/examples/power.md

.docs/examples/survey.md

.docs/examples/xps-data.md

.docs/images/logos/iap.png

.docs/images/logos/umweltbundesamt.png

.docs/images/screenshots/air-notebook.png

.docs/images/screenshots/mfcc-jupyter.png

.docs/images/screenshots/xps-chart.png

.docs/images/screenshots/xps-notebook.png

.docs/why.md

.gitlab-ci.yml

dbrepo-analyse-service/Pipfile.lock

dbrepo-analyse-service/lib/dbrepo-1.4.4-py3-none-any.whl

dbrepo-analyse-service/lib/dbrepo-1.4.4.tar.gz

.../java/at/tuwien/service/SubsetServiceIntegrationTest.java