added mediafile migration script
adhocracy_kotti_theme: added bootstrap.min.css
added adhocracy_kotti to adhocracy_service/kotti
adhocracy_kotti: cleanup
adhocracy_kotti: Fix image scaling is not working right
mediafile: added backref mappings
edit and show proposal mediafile
server adhocracy and adhocracy_service/kotti in one WSGI process
adhocracy_kotti: fix tests
added options to disable assigning mediafiles to proposals
moved staticpages module to new branch
mediafile model: more DRY
mediafile: test __repr__
model: mediafiles to comments assignment.
Restrict .gitignore

User more absolute paths, especially for generic names which also appear
in folders which should be tracked (e.g. `lib`).
Add missed file lib/helpers/adhocracy_service.py
ui to add images comments (javascript only)
adhocracy_kotti_medicenter: new image scales
mediacenter cleanup
mediacenter: readded functional test/docu