fix bugs and web enhancement (for hautu only)

fix the bugs: 1: via paypal payment, size and quality info missing in the order 2: via paypal payment, the order status in email notification is wrong. 3: via paypal payment, after check out successfully, customer can't add product to shopping cart. 4: a new bug of custom draw: if the custom draw is allowed to check out, after customer add it to shopping cart and log out, then if log in again, the thumbnail image in shopping cart will change. tiny enhancement: 1: let all the product names in admin order details or customer's account history be linkable to the product info page. For example, LIGH1001, change it to LIGH1001 and add url link to product page. 2: if the product is custom draw, could you please let the image name linking to the popup image of this image (apply to customer order info and admin order info). Otherwise it will be confusing if customer upload more than one image.