Done:
    CWalletCoin
    zerocoin_wallet storage
    RPC mint txn (but still need a high level command: "mintzerocoins")
    relaying mint txns


Almost done:
    accum. chkpts in block

Next:
    wallet witness update
    wallet mint logic
    refactor CoinSpend
    RPC create spend + impl.
    store own spend pieces locally
    RPC get seeding spend proofs
    net: seed spends
    net: receive and verify spends
    store received spend pieces
    wallet spend logic
    2 1/2 days debugging
    (GUI if time permits)


I'm a little bit behind schedule, but I have more time each day for the next 4 days, so I'll definitely be able to catch up.