Update to Plek 1.0
Make script/rails executable
Set GOVUK_APP_DOMAIN in the spec_helper
Remove save_page debug method from existing test
Add preview link to country editions index page
Merge remote branch 'origin/index-preview-link'
Use single quotes within Gemfile

This is more to be consistent throughout the file than anything else.
Remove extra whitespace
Merge remote branch 'origin/master' into panopticon_registration

Conflicts:
	Gemfile
	spec/controllers/admin/editions_controller_spec.rb