tracks are no long deleted, rather their hidden boolean value is set to true which prevents them from being displayed on the page
Remove version_tracks_id column from Version table
add form for selecting versions. todo: sort items in list in descending order by date created, and implement JavaScript to update the page to username/songname/versions/:id every time a new version is selected
track versions now sort by updated_at desc in the dropdown menu
moved sorting logic out of the view. Bad Taylor!
user can now access versions by /:username/:songname/:versionid
add javascript to allow seamless picking of versions