When the City of Denver first cleaned up the Ballpark District homeless encampment at 20th and Curtis streets back on November 1, Anthony and Angel Martinez — siblings and residents of the encampment — were looking to get swept as a way to get into housing. “We missed it when they came by offering motels and housing vouchers because we were out,” Angel says. “There were people who just moved in right across the street and then got housing real quick, and we just didn’t know they were coming by.”…