[conformal/btcwallet] bc4988: Move json errors to btcjson and call from there.

[John C. Vernaleo]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcwallet
  Commit: bc498893d6dd131ba658683d8a30d75dced64673
      
https://github.com/conformal/btcwallet/commit/bc498893d6dd131ba658683d8a30d75dced64673
  Author: John C. Vernaleo <j...@conformal.com>
  Date:   2013-10-22 (Tue, 22 Oct 2013)

  Changed paths:
    M cmdmgr.go

  Log Message:
  -----------
  Move json errors to btcjson and call from there.

ok jrick@