Augur V2 Is Live

Augur is a decentralized oracle and peer to peer protocol for prediction markets.

contracts: https://github.com/AugurProject/augur/tree/dev/packages/augu...

client code: https://github.com/AugurProject/augur

I'm not super familiar with prediction markets. Could someone explain how exactly these markets create initial liquidity, how they set the number of tradeable shares, etc?