First draftish version of article. No migration yet, as it's not yet used nor finished.
Added unit tests for article creation from feedItem. Right now I use the signal post_save, but this is not suitable (it's also called after changes, e.g.)
Created a custom signal that is triggered when a FeedItem gets created.
Added initial migration for article.
rempove import of depreciated djcelery.
adjust to pep8 and fix missing/unnecessary imports.
Merge branch 'origin-articlecelery'
make entry abstract and add it to INSTALLED_APPS.
AbstractArticle inherits from Entry.