Abstract: has now an attribute 'approved' and 'published'
AbstractService: first outline for the abstract service class.
Models: move model package to top level
AbstractService: add conference id as parameter to create().
Abstract: has now an attribute 'approved' and 'published'
Merge upstream/master into local master
Merge upstream/master into local master
Merge pull request #8 from stoewer/master

Okay.