PRESS PHOTO BY JIM MARSHYoungsters receiving care in the pediatric unit of the the Lehigh Valley Reilly Children's Hospital on the Cedar Crest Crest campus of the Lehigh Valley Hospital had a rare treat Nov. 14 when window cleaners dressed in superhero costumes appeared outside the windows of their hospital rooms. Mya Nelson, of Allentown, links hands through the window as “Spiderman and Captain