This commit makes a large number of minor changes concerning API usage
within the deamon to match the latest version on the upstream btcsuite
libraries.
The major changes are the switch from wire.ShaHash to chainhash.Hash,
and that wire.NewMsgTx() now takes a paramter indicating the version of
the transaction to be created.
As noted in the comment on the method, this serialization method isn’t
strictly necessary assuming the root is derived via a cryptographically
secure, yet deterministic procedure. The method is supplied only for
convenience.
