Merge branches 'master' and 'zodb_substance_d' of ssh://github.com/adhocracy/adhocracy-3 into zodb_substance_d
updated Readme, more doku links
make 64-Bit architecture mandatory
moved obviel-test to src/frontend
frontend: file refactoring
frontend: experimental editing support
obviel: better error messaging

In chrome this thrown error was unreadable.

Should probably be fixed upstream.
frontend: added some inheritence for editable views
frontend: experimental support for editing structured documents
added pep8 script to check code
content creation with substanced, initial commit
Fix: get_all_content chooser script is not working
Fix: storing references is not working
refactoring interfaces.py
allow to locally override content type metadata
use content metadata to filter addable types
make content factories context aware, we can use this later to allow local content type modifications.
add views refactoring
Merge branch 'zodb_substance_d' of ssh://github.com/adhocracy/adhocracy-3 into zodb_substance_d
Merge branches 'zodb_substance_d' and 'master' of ssh://github.com/adhocracy/adhocracy-3