[zanata/zanata-client] 99213a: update wording and add note to docId

[GitHub]

  Branch: refs/heads/update-readthedocs
  Home:   https://github.com/zanata/zanata-client
  Commit: 99213a6b25180782bac81dfd43620142e27c8c1d
      https://github.com/zanata/zanata-client/commit/99213a6b25180782bac81dfd43620142e27c8c1d
  Author: Patrick Huang <pahuang at redhat.com>
  Date:   2015-03-19 (Thu, 19 Mar 2015)

  Changed paths:
    M docs/configuration.md

  Log Message:
  -----------
  update wording and add note to docId