[zanata/zanata-server] 600c22: Move 'configuration' to 'system-admin' section

[GitHub]

  Branch: refs/heads/update-doc-index
  Home:   https://github.com/zanata/zanata-server
  Commit: 600c225efd3f07589c75562babcc2a4840abdeb5
      https://github.com/zanata/zanata-server/commit/600c225efd3f07589c75562babcc2a4840abdeb5
  Author: Alex Eng <aeng at redhat.com>
  Date:   2015-05-07 (Thu, 07 May 2015)

  Changed paths:
    R docs/configuration/authentication.md
    R docs/configuration/document-storage-directory.md
    R docs/configuration/email.md
    R docs/configuration/infinispan.md
    R docs/configuration/installation.md
    R docs/configuration/jms-messaging.md
    M docs/index.md
    A docs/user-guide/system-admin/configuration/authentication.md
    A docs/user-guide/system-admin/configuration/document-storage-directory.md
    A docs/user-guide/system-admin/configuration/email.md
    A docs/user-guide/system-admin/configuration/infinispan.md
    A docs/user-guide/system-admin/configuration/installation.md
    A docs/user-guide/system-admin/configuration/jms-messaging.md
    M mkdocs.yml

  Log Message:
  -----------
  Move 'configuration' to 'system-admin' section