Remove exception notification
remove obsolete email-content testing for exceptions
Merge branch 'master' into remove-exception-notification

* master:
  Use title/URL from publisher for new start pages
  Remove mustache dependancy
  Only import toolkit buttons mixin once
  mobile spacing, you'll need
  Change service URL for check vehicle tax
  Change related links title to match browse page
  add mobile margin
  Widen the "you'll need" column
  Use style guide for requirements heading
  Swap requirements and instructions
  Add the usage requirements to the original service
  Create new-style start page for check-vehicle-tax

Conflicts:
	Gemfile
Merge pull request #576 from alphagov/remove-exception-notification

Remove exception notification