"Use consistent html writer (plugin#294) (#3276)
"Use consistent html writer (plugin#294) (#3276)

Writer html5_polyglot is used in plugins/compile/rest/__init__.py whereas the
rst2hmtml is initialized with `writer_name='html'` which according to
docutils doc http://docutils.sourceforge.net/docs/user/html.html defaults
to `html4css1`. This discrepency prevent plugins adding role to work

Closes https://github.com/getnikola/plugins/issues/294
getnikola/nikola,okin/nikola,getnikola/nikola,okin/nikola,getnikola/nikola,getnikola/nikola,okin/nikola,okin/nikola