added Procfile
Added show method to post controller
Added upvote and downvote custom routes.
Added tests for posts#show route
Added upvote and downvote methods
Added post#show view.
Added _show_post partial view
Added comments#create as nested under posts
Added post#show view.
Added create method to comments controller
Added (fake for now) method to get song from rdio
Refactored PostsController's show method to utilize get_song_from_rdio method
Removed position:fixed and top:0px from .nav_bar in css to temporarily correct bug.
added jquery update to most recent posts, my profile button added to layout nav bar