FRIDAY >> Calling all horror, cult, and Italian cinema freaks. The screening of the summer is upon you. The Library of Congress is hosting an extremely rare chance to see Dario Argento’s “Four Flies on Grey Velvet” at 7 p.m. Make sure to call the Pickford Theater by 4 p.m. to reserve your seats, as this film is not available on DVD and is very difficult to find. The final episode of the so-called “Animal…