[conformal/btcjson] 56a623: Add some error messages to be used by btcd.

[Owain G. Ainsworth]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcjson
  Commit: 56a62309ae43a6120c411a71a72247c83b6fe2ba
      
https://github.com/conformal/btcjson/commit/56a62309ae43a6120c411a71a72247c83b6fe2ba
  Author: Owain G. Ainsworth <o...@conformal.com>
  Date:   2013-11-05 (Tue, 05 Nov 2013)

  Changed paths:
    M jsonerr.go

  Log Message:
  -----------
  Add some error messages to be used by btcd.

ok jcv