[zanata/zanata-parent] 67d7a0: docs: add CONTRIBUTING.md

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zanata/zanata-parent
  Commit: 67d7a0402d8fb98bc0789c8d85309749d31a00fe
      https://github.com/zanata/zanata-parent/commit/67d7a0402d8fb98bc0789c8d85309749d31a00fe
  Author: Ding-Yi Chen <dingyichen at gmail.com>
  Date:   2016-03-11 (Fri, 11 Mar 2016)

  Changed paths:
    A CONTRIBUTING.md

  Log Message:
  -----------
  docs: add CONTRIBUTING.md