WATERVILLE — Screen actor Michael Murphy will be presented with the annual Mid-Life Achievement Award at this year’s Maine International Film Festival, organizers announced Friday. Murphy has appeared in movies from directors such as Tim Burton, Oliver Stone and Woody Allen, and had a long association with director Robert Altman. The announcement comes about a month before the city’s 10-day festival opens July 10. The festival’s opening night will include the Maine premiere of “Tumbledown,” a romantic comedy starring Rebecca Hall and Jason Sudeikis, by Portland filmmakers Desi Van Til and Sean Mewshaw.