Update docutils to 0.13.1
Updates docutils from 0.11 (2013-07-22) to 0.13.1 (2016-12-09).
Checklist
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Check if COPYING is not changed on Docutil Subversion repo.
Closes #4117 (closed)
Edited by GitLab Release Tools Bot
Updates docutils from 0.11 (2013-07-22) to 0.13.1 (2016-12-09).
Closes #4117 (closed)