DC continues to expand its reach into television with the CW’s Arrow and The Flash and Fox’s Gotham. Now, they’re headed to CBS with a Supergirl pilot, and lo and behold, we’ve got an actress. Melissa Benoist, who got her break on Glee and has a role on this year’s Oscar dark horse Whiplash, will be the lead in what is certainly sounding like a very high profile show. Like in the comics, Supergirl is Superman’s little cousin, but whether Benoist will be involved in any of her big cousin’s huge budget movies remains to be seen. In any case, welcome to the ever growing world of actors who play superheroes, Melissa Benoist …