add ownInput, ownOutput, ownTX methods.
remove bcoin sign hook.
fix: potentially do not save tx without it's successful broadcast.
use noWrite for addTX.
allow different behavior for "change" addresses for transactions.
minor: comment and reorganize.
use custom fill method for txs with "from" accounts.
delete new change addr even on bad tx.
minor: wrap cb in setImmediate.
pending txs. parse tx/block optimization.
use bcoin script helpers.
comments. balance. version. `tx` handling.
use bcoin v0.14.2.
fix: version logging.
fix: version handling.
use pending txs properly.
remove pending txs.
Revert "remove pending txs."

This reverts commit 0333b9bb5f4b198c1db07f30327cd13e46feb43b.
v0.0.3