signatures are now added in order of pubkey
signatures are now added in order of pubkey

As per https://bitcointalk.org/index.php?topic=390046.msg4687868#msg4687868 signatures need to be in the order of the pubkey to avoid a rejected transaction. This update solves this.
bankonme/bitcoin-multisig,fredericksilva/bitcoin-multisig-1,studio666/bitcoin-multisig,OutCast3k/bitcoin-multisig,javascriptit/bitcoin-multisig,fredericksilva/bitcoin-multisig