Updates to qanta.org

We have updated our project site for qanta.org with many more resources.

• Datasets: datasets.qanta.org
• AI Assisted Quiz Bowl Question Writing
• Events for 2019
• Competition Leaderboard: leaderboard.qanta.org
• Baseline System Code: github.com/pinafore/qanta-codalab
• Videos of Prior Events: events.qanta.org