Shot in Boston, with a cast of 42, it's a wonderful Kwanzaa December 16, 2007 While the Christmas film has been a staple of American cinema since George Bailey discovered it's a wonderful life, the African-American holiday of Kwanzaa, observed from Dec. 26 to Jan. 1 each year, has been around for only about 40 years, and the cinematic pickings are much slimmer. That's why a Boston-based independent filmmaker believes he's breaking new ground with his movie. "Kwanzaa with the Jones's" will have its premiere Thursday at 7:30 p.m. at the Coolidge Corner Theatre in Brookline. The film is the...