Send welcome email to gift code subscribers

Fixes #204
fix test flicker on name encoding
Merge branch 'refs/heads/master' into gift-code-signup-email

Conflicts:
	app/controllers/subscriptions_controller.rb
	features/step_definitions/gift_code_steps.rb
Merge branch 'refs/heads/master' into gift-code-signup-email

Conflicts:
	app/views/notifications/welcome.html.erb
Merge pull request #209 from seedpod/gift-code-signup-email

Gift code signup email
Fix rails_admin security issue by using gem
Merge pull request #223 from seedpod/fix-rails-admin-issue

Fix rails_admin security issue by using gem
Add “previous / next pod” controls to pod view
Set faker locale to en-gb
Merge pull request #227 from seedpod/225-faker-postcodes

Set faker locale to en-gb
Add some tests for "previous/next pod" links
Merge pull request #226 from seedpod/125-pod-controls

Add “previous / next pod” controls to pod view
Change subscribe links to go straight to signup page
Merge pull request #230 from seedpod/subscribe-links

Change subscribe links to go straight to signup page
Merge branch 'refs/heads/master' into auto-generate-pods

Conflicts:
	app/models/pod.rb
Merge branch 'refs/heads/master' into auto-generate-pods