CARACAS( Reuters)-A Venezuelan transportation app is offering residents of the capital city Caracas the opportunity to find safety and tranquility where they least expect to find it: on a bus. The city's buses have for decades been famous for pickpockets, diesel fumes, and cramped seats-conditions that have worsened in recent years due to chronic fuel shortages that have made transit increasingly irregular.A recently-launched application called La Wawa allows users to reserve a seat on an air-co