Storage #get_head_hash and speed up #get_depth
add address value to TxOut#to_hash
relay transaction and measure propagation
Tx#to_hash options, make address in txout optional
Script#get_addresses: always return an array
fix error handling in #relay_tx
adjust wallet to new relay_tx command
hot-fix heisenbug(s?) in version parsing
rescue parsing errors
use BLOB datatype for binary data in mysql and sqlite