create supertable leaderboard
create supertable leaderboard

Sage-Bionetworks/SynapseChallengeTemplates,thomasyu888/SynapseChallengeTemplates,cbare/SynapseChallengeTemplates,Sage-Bionetworks/U4CChallenge,cbare/SynapseChallengeTemplates,Sage-Bionetworks/SynapseChallengeTemplates,thomasyu888/SynapseChallengeTemplates,Sage-Bionetworks/U4CChallenge,Sage-Bionetworks/U4CChallenge,thomasyu888/SynapseChallengeTemplates,cbare/SynapseChallengeTemplates,Sage-Bionetworks/SynapseChallengeTemplates,cbare/SynapseChallengeTemplates,thomasyu888/SynapseChallengeTemplates,Sage-Bionetworks/SynapseChallengeTemplates