Use Errorf when using formatting directives.

Found by go vet.
Add getnetworkinfo support to btcctl.

ok @jrick
Use the new bloom Reload API.

This fixes a race caught by the go race detector.
ok @jrick
Pass the correct types for signrawtransaction.
Make btcctl errcheck clean.

This commit explicitly ignores errors that were already intentionally
ignored in btcctl by using an _ to make the errcheck utility happy.  It is
also nice to make it explicit that the error is being ignored
intentionally rather than leave questions of whether it was accidentally
forgotten.