Copied over basics from hhu-adhocracy branch
Rename user import from "import" to .. userimport
Fix and extend URL tests
Update importexport (intermediary commit)
Merge test_url from develop
Merge branch 'develop' into feature-importexport
Merge branch 'develop' into feature-importexport
Clean up some more
Clean up some more
add tests for export
importexport: extend tests and fix bugs
Merge branch 'develop' into feature-importexport

Conflicts:
	setup.py
Merge branch 'develop' into feature-importexport
Simplify checks
Merge branch 'develop' into feature-importexport
add more tests and simplify more
importexport: fix tests, streamline implementation
Proposal import/export
Comment export
Comment export