Billing updates for renewal form processing.

Billing updates for renewal form processing.

Updating the text on the renewal form for Membership Renewal.
adding payment option for pay by check.
showing the invoice after the submit is done.
change name of submit button to Submit Membership Renewal.
adding table layout for the renewal form sections  for choosing
the member type and employees so prices line up.

Fix the issue with incorrect class was being pulled for employees.
Also updated the employee list so if they don't have a payable member
type then they won't show up in the renewal form.