Coding standard changes
Coding style cleanup for cart api, no intentional logic changes
    Changed version number to 3.8.10
    Added public to constructor
    Cart Class File Cleanup and Function Deprecation
    Quotes around a constant name were missing
Merge branch 'customer-meta-and-checkout' of github.com:JeffPyeBrook/WP-e-Commerce into customer-meta-and-checkout
Merge remote-tracking branch 'origin/cart-class-to-its-own-file' into customer-meta-and-checkout

Conflicts:
	wpsc-includes/cart.class.php