Add PostVote model
Update post votes after save post_vote
Remove nested route for posts
posts#vote action
Vote up and down button
Add votes style
Fix post actions margin
Add qunit
js Post.updateVotes function; remove unuse assets
Update psot vote status in js
Fix post vote action for new data attr
Fix post vote js test
Desiable turbolink in qunit index
Rename js module Post to Posts
JS VisibleTo module
JS visible-to creator script
JS redirect to login path when vote without login
Split Post#votes column to votes_up/votes_down
Change post vote value to boolean
Fix vote button hover style