Merge remote-tracking branch 'origin/feat/change-gate-to-notice' into feat/issue-243
added response model
data migration for empty notice_type
added notice_type selection to admin/notices/_form
Solved #243
added responses controller, view.
survey, plain, external notice creation, and to reply survey are now available.
*need to design*
Merge branch 'develop' of github.com:DonutWorks/Ari into feat/issue-243

Conflicts:
	app/models/user.rb
	app/views/admin/notices/show.html.erb
	spec/unit/models/user_spec.rb
Merge pull request #247 from DonutWorks/feat/issue-243

Feat/issue 243