Version History
2.1
Refactored the controller code into a reusable class, to make it simple to invoke the getLists() and subscribe() functions outside of the context of the block. For instance, hooking into the on_user_add event. An example is present in the package controller's on_start method - commented out.
2.0.1
Removed $_POST. Updated form label (was 2 x First name)
2.0.0.0
1.0.1 Fix undefined constant warnings in PHP 7.2
1.0.0 Support for subscribing to mutiple lists
0.9.5 Marketplace approved
