Murdock DevWorks V4 Ecommerce Templates Page Structure Update

This update changes the public PHP pages back to an Ecommerce Templates style structure.
Each page now has its own PHP code, its own page identity section, and its own page-specific include.

Important changes:
- products.php includes vsadmin/inc/incproducts.php
- categories.php includes vsadmin/inc/inccategories.php
- proddetail.php includes vsadmin/inc/incproddetail.php
- cart.php includes vsadmin/inc/inccart.php and inccrosssell.php
- thanks.php includes vsadmin/inc/incthanks.php
- search.php includes vsadmin/inc/incsearch.php
- giftcertificate.php includes vsadmin/inc/incspecials.php as shown in the Ecommerce Templates manual
- orderstatus.php includes vsadmin/inc/incorderstatus.php as shown in the Ecommerce Templates manual
- affiliate.php, clientlogin.php, and tracking.php each have their own ECT include

The global header now includes the required Ecommerce Templates 7.x frontend lines:
<link href="css/ectcart.css" rel="stylesheet" type="text/css">
<script type="text/javascript" src="js/ectcart.js"></script>

This package intentionally does NOT include /clearchat/, /digitalgoods/, /mdw_updater/, or database/config files.
Use this as a website page/template overlay and test one page at a time.
