Webtix6 demo v2011.04.10 update

Feature Enhancement:
1) Enhanced season ticket purchases.  If a particular event has the same seating-plan as the season, seat selections will automatically be reserved on the individual events of that season.
2) Enhanced all payment modules for better functionality with Webtix6.  In particular there is now better Authorize.net SIM interface and PayPal ExpressCheckout interface functionality.