Back to one row per submission in the submission table
Clean up submission table and leaderboard to support previous results
Merge branch 'master' into production

Conflicts:
	codalab/apps/web/tasks.py
	codalab/apps/web/templates/web/competitions/_results.html
	codalab/apps/web/templates/web/competitions/_submit_results.html
Resolve merge conflict
Turn off debug
Merge branch 'master' of https://github.com/codalab/codalab into production
Fix typo