Revert "remove all cases of self.non_breaking_paragraph; DNE in docutils >0.8"
Revert "remove all cases of self.non_breaking_paragraph; DNE in docutils >0.8"

This reverts commit 5dd888dd4fe72d9b168e33a05758bbf8f368c68e.

sbenthall/scipy_proceedings,michaelpacer/scipy_proceedings,sbenthall/scipy_proceedings,michaelpacer/scipy_proceedings,sbenthall/scipy_proceedings,michaelpacer/scipy_proceedings