vote migration, model, associations
model tests user/posts has_many votes
custom vote route
vote action saves vote
vote button added to comments
add vote count and users who voted to comments
profiles display votes
limit one vote per user per comment
Fixes failing tests on master
refactors controllers to use login helper
Merge branch 'voting' of https://github.com/morganwildermuth/gutoverflow_forked into voting
Merge branch 'add_comments_count' of https://github.com/morganwildermuth/gutoverflow_forked into voting
add total votes per topic to index