BOURNE — A member of a Massachusetts town's governing board charged with attacking his girlfriend and threatening her with a baseball bat has resigned.In a letter read during the Bourne Board of Selectmen meeting Tuesday, member Michael Blanton said his resignation is effective immediately. The 49-year-old says he cannot represent the people of Bourne in the way he envisioned or the way the people deserve.Blanton is accused of attacking the woman Nov.