Store XPUB instead of Bitcoin addresses.

[gcomte]

Allow to store Extended Public Keys (XPUBs) in Marina.

Marina could then derive a new address for every payment and as such improve privacy (no address reuse).

Caution: Just deriving a new address every month is not enough. Instead, Marina should also check, whether a newly derived address has already been used (possibly by another wallet/service than Marina itself).