connect 5.x-2.0-beta1

2.x has many new features and improvements over 1.x

- functions totally restructured, configuration moved to UI
- Email functions completely rewritten for greater flexibility and more options
- Added caching of email lookup functions
- Added ability to re-send failed emails
- Added beginnings of full double opt-in system
- Added menu and callback handling for connect action functions
- Added "display participants" functionality