Directed by: Edgar Wright Starring: Simon Pegg, Nick Frost, Martin Freeman, Paddy Considine, Eddy Marsan, Rated: R for pervasive language including sexual references. Simon Pegg and Edgar Wright have brought us a pair of films that manage to be several things at once: “Shaun of the Dead” was a romantic comedy, a zombie movie, and a coming-of-age flick; “Hot Fuzz” was a buddy cop movie, a conspiracy thriller, and a tale about finding a place you belong where you least expect it. They continue this pattern with what they’re calling the third installment in “The Cornetto Trilogy,” “The World’s End.” It’s a sci-fi thriller, a story about the difficulty of becoming an adult, and a look at the importance of friendship. Back in high school, Gary King (Simon Pegg) and his friends were an inseparable group. After graduation, they attempted a legendary pub crawl in their tiny hometown, The Golden Mile: twelve pubs, have at