Have you heard? Uber is hiring. CEO Travis Kalanick wants a chief operating officer. Heapparently came to this decision in the midst of the company’s worst PR crisis yet. Accusations of a misogynistic company culture,aGoogle lawsuit, and allegations that it misled regulators with phantom rides leave the company in an almost permanent state of damage control.Hiring a COO almost certainly is Kalanick’s attempt to show that he, and his company, can grow up.