add class for "pre-title" content like dates
Split date from title in Divisions#show <h1>

Addressing issue https://github.com/openaustralia/publicwhip/issues/287
indicate house/senate in pre-title divisions#show
update fixtures for change in division#show title
Merge pull request #291 from openaustralia/division-front-end

Added date & house to pre-title as in Issue #287