Saint Patrick’s Day is lousy with werewolves.  If you went out in public on March 17th, chances are you’ve seen them. People who get so drunk that they enter a feral state and experience sudden bursts of rage that could harm innocent bystanders. But don’t worry.  They’ll pass out and forget what they’ve done when they wake up. Does any of that sound familiar when seen through a horror lens? Larry Fessenden asks us to look through it with his latest film, “Blackout” from Glass Eye Pix and Dark Sky Films.