btc

A useful feature where the user specifies the quantity to take in an orderbook and callback returns the average price paid for that lot size. For example if the offers in the order book for BTC-USD was the following:

Price | size
11,000 | 1
10,500 | 1
10,000 | 1

If the user specified quantity 3, the callback would return 10,500.

We need to write how to use Script things in README.md.

Instead of having 3 parameters to handle HSM vs non-HSM, signed vs unsigned and testnet vs mainnet, we should we have a single parameter (which picks among 4 profiles).
The 4 profiles would be:

• dev-without-hsm = no HSM, btc-testnet
• dev-with-hsm = HSM, unsigned, btc-testnet
• staging = HSM, signed, btc-testnet
• prod = HSM, signed, btc-mainnet

See https://github.com/square/subze

Try to avoid scrollbar. Maybe arrange them in two rows if it's more then 5-6 elements

Thinking to just have it dump the raw wallet files to a file would be useful, especially for some older wallet types.