Add standard booking site for every operator #377
Description
In #353 (comment) there is a discussion about deleting the BDZ website from the BDZ FIP Guide site. I understand why you want do that but I think it's not user friendly if we don't mention the operator standard booking website at all. The best travel information for the operator is usually available at the operator website. So if we don't mention them at all nobody knows where to find travel information. Let us discuss this again and find a good solution