Merge branch 'translation/russian-publishing' of https://github.com/okfish/django-periodicals into projects/publishing
Merge branch 'translation/russian-publishing' of https://github.com/okfish/django-periodicals into projects/publishing
Merge branch 'projects/publishing' of https://github.com/okfish/django-periodicals into projects/publishing
Article series now stored in the separated model, which uses django-treebeard. Also, ArticleCreateUpdateForm introduced with some stolen methods, that makes tree-like drop-down options available in the admin panel.
TODO: select2 or other autocompleting widget for category selection.
South migration does not support field renaming from CharField to ForeignKey so two different migrations generated. Think twice on model design!
Merge branch 'feature/extend_atricle_model' into projects/publishing

Conflicts:
	periodicals/models.py
Introduce 'add related series' widget for easier article editing. RelatedFieldWidgetWrapper from django.contrib.admin used with some magic. See http://stackoverflow.com/questions/2347582/django-admin-popup-functionality
Merge branch 'feature/extend_atricle_model' of https://github.com/okfish/django-periodicals into projects/publishing
Add verbose names to model fields where it possible.
Merge branch 'translation/russian' into translation/russian-publishing
Make Issue model instance name customizable