Started integrating the notification center
Adjusted interface usage
Fixed token descriptions
Added recipient token info
Changed tl_module to notification center
Only pass notification choice to order
Use  the notification center to send an order confirmation
Fixed wrong namespace reference
Fixed wrong param for hook
Modified tl_module to support a separate notification collection template and a document choice
Support adding documents to the notification
Removed isotope internal mail handling
Adjusted the status update to the notification center too
Adjust to latest notification center changes