Improving tabs
Collabsible does not expand yet
Collabsible expands now
Polishing collapsible
Moving collapsible to partial
Merge branch 'master' of https://github.com/Defra/capd-styleguide

* 'master' of https://github.com/Defra/capd-styleguide:
  Removed mailto link from collapsibles
  Added new tag to latest addition to make people aware
  Article changed to a div as advised by Leonie from GDS
  Changed details ul into a dl