add more info to the getblock rpc call
changelog.md: additional info RPC getblock
Merge pull request #1 from phelixbtc/patch-9

changelog.md: additional info RPC getblock
Merge pull request #119 from ryancdotorg/namecoinq

add more info to the getblock rpc call
Start with UTXO database implementation.

Start with the implementation of a UTXO set database for tx
verification.  This is a squashed commit of the old utxo branch after
rebasing it onto the DatabaseSet changes.
Update the UTXO set in DisconnectInputs.

Also handle the UTXO set in DisconnectInputs.  Not yet really tested.