expose block size
expose size and idx
cache instance variable
get_received(address)
add method for model tx and block

#total_out
#total_in
#total_fee
fix block/tx size
Properly handle blk?????.dat files from bitcoind
Optimizing indices for utxo table
debug output for unknown script type
remove dns seed for old testnet, update docs
collect simple pkt stats in Bitcoin::Protocol::Parser
keep all orphan blocks when on testnet, even if not in sync

because on testnet there are sometimes bigger gaps between the blocks and also frequent reorgs. whenever those coincide, the node would trow out an orphan block that's needed to do the reorg.