Shapeshift integration

[wolffan]

Add the ability to transfer tokens between your own accounts using shapeshift.

• [ ] Be able to select an address of origin (coinbase or any existing) and a destination address to send money.
• [ ] Prework: we may need to add api's on coinbase/poloniex/gdax to know the addresses a user has
• [ ] Show the transfer information based on exchange (if we have that info) or at least show the % cut of shapeshift
• [ ] Be able to introduce a random address (external not in Balance