ecommerce 6.x-4.5

This is a bug fix release where a lot of work has been done around anonymous vs. registered user purchases to make sure that they can't be mucked up.

This has also been some work on the other small bugs and views integration.

Changes since 6.x-4.4:

• Add in support for converting file to ec_file
• added handlers for views support
• Fix up uninitalised error when there is no products with quantity.
• Added more views join details for receipts and transactions
• * Change path to Anonymous Purchasing setting display when installing ec_anon.
• Charge order of checks for determining if a product checkout is a form or a link to be more efficient.
• Fix issue with WSOD when redirecting to login to allow the anonymous user to login.
• Add new purchase policy to allow products that can only be purchased by registered users, but still allow anonymous users to add them to their cart.
• Add test to allow checking of the new Purchasing Policy.
• Fix up paradox in that you can have both products with anonymous and registered in the cart at the same time.
• Fix issue where the checkout product form is doing a double validation.
• Add tests to make sure that when you have an anonymous only product it will not allow registered only products to be added to the cart, and vice versa.
• When all items are removed from the cart make sure the ec_checkout_id is unset to allow deletion of the session.
• Fix up issue where cart was causing session to always be created.
• Fix issue which stopped products from always being removed from cart.
• Revalidate all items in the cart after login to make sure the user can still purchase them.