>> Filmfest DC screens Sierra Leone’s Refugee All Stars, a concert tour documentary unlike any you’ve seen. The movie follows a group of people fleeing from Sierra Leone’s decade-long civil war who form a unique band and face the daunting task of facing the future in a war-torn society. [4000 Wisconsin Ave., NW, $9, 6:45 p.m.] >> As we told you last week, it’s a great week for lovers of big band music. The…