[conformal/btcjson] 8f4643: Add go vet and golint to travis-ci config.

[John C. Vernaleo]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcjson
  Commit: 8f4643df14832a09183427810ddef051a7a4aeec
      
https://github.com/conformal/btcjson/commit/8f4643df14832a09183427810ddef051a7a4aeec
  Author: John C. Vernaleo <j...@conformal.com>
  Date:   2014-09-08 (Mon, 08 Sep 2014)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Add go vet and golint to travis-ci config.

For golint, min_confidence is set to 0.9 since things aren't totally
golint clean yet.