Add multisig contract for keeping all the ETH
Add multisig contract for keeping all the ETH

Closes https://github.com/raiden-network/raiden-token/issues/54

All received ETH from the bids will be sent to this wallet. So no ETH will be lost / frozen in the auction contract if something goes wrong.

raiden-network/raiden-token,raiden-network/raiden-token,raiden-network/raiden-token