1.0.0.42

Event Sponsor: added statuses of Unpaid and Paid for payment tracking.
Event Sponsor: added fields Send Invoice, Resend Invoice and Invoice Sent Date for sponsor invoicing.
Event Sponsor: new page to show everything about the event sponsor in one place (sponsor information, event being sponsored, sending invoices, accepting payments).
Event Sponsor Item: new table to track all sponsorship levels a sponsor will be contributing to the event.
Payment: new table to track all payments received for a sponsorship or membership.