include markdown extra only in admin
analyse models rake task now drops keywords and wordcounts tables
moved admin actions to bottom of edit form in cms admin
formatting
added cancan permissions for guest users (members of the public)
remove hardcoded reference to searchify index - this is set in .env
added draft watermark on articles which are not published (only visible to users of the cms)
use cancan to authorise quickanswer#show - only logged in users can view draft articles
improved draft watermark - smaller, more visible
quick answers can be previewed without changing the model
bugfix: preview now works when creating new quick answers.  merging a fake db id with the form params
use Save instead of Update for the article form - reduce confusion when creating new articles
reduce opacity of draft watermark for when article title ovelaps
can also preview web services
disable preview for guides
use PREVIEW text instead of DRAFT watermark since you can preview a published article
put the preview article in database-backed session storage rather than the URL.  now supports articles >2000 characters