Lowell Film Festival April 4-5 Various locations in Lowell Free; RSVP to getinthefilm@lowellfilms.org Lowell's not necessarily the epicenter of film, but it's getting into the swing of things next weekend (April 4-5) with its first film festival. Focusing on globalization and immigration, the festival reflects how Lowell is growing and changing as rapidly now as it did in the city's 19th century heyday. The festival opens Friday, April 4 with headliner film Sacco & Vanzetti,......