ENH: add escape parameter to to_html()
DOC: mention new to_html() escape argument and & escaping
Merge remote-tracking branch 'gdraps/to-html-escape-parm'

* gdraps/to-html-escape-parm:
  DOC: mention new to_html() escape argument and & escaping
  ENH: add escape parameter to to_html()

Conflicts:
	RELEASE.rst