Merge branch 'allow_grouped_identifiables' into 'master'

.docker/Dockerfile

.docker/docker-compose.yml

.docker/pycaosdb.ini

integrationtests/full_test/crawl.py

integrationtests/full_test/extroot/.cerate_dir

...est/extroot/DataAnalysis/TestProject/2019-02-03/README.md

..._test/extroot/DataAnalysis/TestProject/2019-02-03/plot.py

...t/extroot/DataAnalysis/TestProject/2019-02-03/results.pdf

...t/DataAnalysis/TestProject/2019-02-03_something/README.md

.../DataAnalysis/TestProject/2019-02-03_something/analyse.py

...Analysis/TestProject/2019-02-03_something/images/lol1.png

...Analysis/TestProject/2019-02-03_something/images/lol2.png

...extroot/ExperimentalData/TestProject/2019-02-03/README.md

...root/ExperimentalData/TestProject/2019-02-03/datafile.dat

...perimentalData/TestProject/2019-02-03_something/README.md

...imentalData/TestProject/2019-02-03_something/usefull.xlsx

...imentalData/TestProject/2019-02-03_something/useless.xlsx

...ications/Posters/2019-02-03_really_cool_finding/README.md

...tions/Posters/2019-02-03_really_cool_finding/datafile.dat

...ublications/Theses/2019_paper_on_exciting_stuff/README.md