Airbnb launched a redesigned app on Tuesday to showcase the company's push to let travelers book services, like catering and personal training, at their home rentals.The new-look app marks a new chapter for Airbnb to expand beyond home stays. The company has previously announced plans to invest $200 million to $250 million in a new business that it said it hopes will become a significant driver of future revenue growth."We now feel like we have such a strong foundation that we are capable of building and ex ...