* Updated the product waitlist tab so waitlist, archive and options can be easily adjusted from one location
* Added functionality to update waitlists etc via ajax to avoid updating product everytime
* Added options to display an opt-in and notice to users that an account will be created using their email address
* Added options for adding google analytic code to waitlist mailouts for tracking returns
* Added option to toggle witlist on/off per product
* Added option to apply a minimum stock level before waitlist mailouts will be sent to users
* Added option to send an admin user an email when a customer registers for a waitlist
* Added option to show waitlist elements on product archive pages (shop, categories etc)
* Added filters for opt-in messages
