Issue #2331515 by Berdir: Allow to show the poll question in the vote/result templates.
getCacheTag() was renamed to getCacheTags()
Issue #1663146 by typhonius, rpayanm, Manuel Garcia | ZenDoodles: Clean up css in poll module.
Improve redirects, use post_render_cache todisplay poll view form.
Add validation for existing votes on vote submit, cleanup, ensure that page is not in render cache when showing resuls, clean up render cache service.
update for page cache changes