Add a live metadata field and only build articles where it is set to 'true'. Also filter out dotfiles from the articles list.
Add type and chapter metadata fields. Courses page will have links to the first chapters of each course. Articles page will only show articles (not course chapters).
Fix failing tests by updating test article metadata. Fix unrelated bug in urls.py. Include nose in pip requirements.
Merge pull request #72 from hazz/article_type

Add live, type, course and chapter metadata