Fix: sdi folder view does not work with not registered content classes
make NodeContainer factory work
added Proposal/ProposalContainer content type
new content types proposal, proposal container
Merge branch 'zodb_substance_d' into obviel-forms
Merge branch 'obviel-forms' of github.com:adhocracy/adhocracy-3 into obviel-forms
frontend: deliver static bogus files from adhocracy3 app as frontend