From Variety.com: MARCH 6, 2015 | 01:00PM PT Elizabeth Wagmeister @EWagmeister “Supergirl” has finally arrived. The first photos of Melissa Benoist as Supergirl were released Friday, just as production begins on the CBS pilot, which is based on characters from DC Comics. The costume (pictured) was designed by three-time Oscar winner Colleen Atwood, who also designed the suits for two other DC C…