Multiple payout targets

[tjstebbing]

Being able to payout in a single transaction to multiple addresses enables the 'fee for processing' usecase where a provider of GigaWallet (as a payment service) wants n% or a fixed amount of doge to go to their own address on payout.

Suggestion:

was:

POST /account/:foreignID/pay { "amount": "1.0", "to": "DPeTgZm7LabnmFTJkAPfADkwiKreEMmzio" } -> { status }

POST /account/:foreignID/pay { "DPeTgZm7LabnmFTJkAPfADkwiKreEMmzio" : "1.0", ... } -> { status }

How does fee work for payout?