Upvote/downvote functionality
Stories sorted by popular
Fixed Story::popular to include stories with no upvotes
order stories by popular first, then by how recent
Change upvote and downvote links to arrows and make popular take downvotes into account
Fix comment ancestries association, change front page to follow HN format
Fix small title helper issue
Link to comments, refactor story into a partial
Fix double display bug but can't get comments to cache
sqlite gem in development
Change Gemfile.lock for heroku
Adjusted paths to new routes