Merge branch 'master' into 331-user-registration

Dockerfile

README.rst

aleksis/core/apps.py

aleksis/core/migrations/0013_pdf_file.py

aleksis/core/models.py

aleksis/core/preferences.py

aleksis/core/rules.py

aleksis/core/settings.py

aleksis/core/static/js/progress.js

aleksis/core/static/print.css

aleksis/core/templates/core/pages/progress.html

aleksis/core/templates/core/pages/test_pdf.html

aleksis/core/tests/browser/test_selenium.py

aleksis/core/tests/models/test.pdf

aleksis/core/tests/models/test_pdffile.py

aleksis/core/urls.py

aleksis/core/util/pdf.py

aleksis/core/views.py

conftest.py

docs/dev/01_setup.rst