update emailer to allow e-mailing either all, paid, or unpaid groups
add ability to email the group of people who haven't yet created registrants
fix problem when marking lodging as paid without entering any details
don't try to look for reg_expense_item if the payment_details are nil
fix payments error notifier to skip notification when the item is a reg item
Merge remote-tracking branch 'scott/master'
change the colouring of the a:visited to unicon colours
Actually fix a:hover for unicon
Better class name for html waiver truncate in event conconfig