Change leaderboards link to /artists.
Add a list of all artists.
Add autocomplete artist search for individual artist leaderboards.
Add before_actions to verify user edits
Create login checker helper method to check logins
Add validation to Artist to make sure it has at least 25 tracks before saving
Set up individual artist leaderboard.
Tabulate leaderboard info.
Add user and scores hash using AREL.
Fix merge conflict in navbar.
Correct conditional to redirect clicking hi-score to login if there is no session user_id.
Use AREL to generate an array of user_id, username, and avergae scores hashed for a particular artist_id.
Add javascript for stats page
Update stats method to return relevant information for taken quiz
Add more information for the User profile to show taken quizzes
Add line to link to Artist on stats page
Add container for user edit page
Add comment about times array being empty unless user is signed in. Should we move the following two lines into the conditional above requiring the user to be signed in?
Add tables for user profile to show their scores
Refactor view and controller to query rather than iterate for leaderboard information.