add return_to param to customize redirect after creation
bump version
Merge branch 'custom-redirect'

* custom-redirect:
  bump version
  add return_to param to customize redirect after creation
Merge branch 'master' of github.com:thegarage/prelaunch into fix-controller

Conflicts:
	app/controllers/waitlist/subscribers_controller.rb
	lib/waitlist/version.rb
	spec/controllers/waitlist_subscribers_spec.rb