Out-of-the-way errands and lack of transportation are common problems for urban residents, but a new ridesharing program coming to the Southeast Como neighborhood could become a solution. Southeast Como Improvement Association is sponsoring an HourCar — a rental car sharing service — to be stationed at Van Cleve Park starting this week. HourCar, run by Neighborhood Energy Connection, a local nonprofit organization, is aimed at promoting energy efficiency and reducing pollution. . .