BOSTON (Reuters) - Kennedy relative Michael Skakel will appeal to the U.S. Supreme Court in a bid to overturn his conviction in the 1975 murder of his 15-year-old neighbor Martha Moxley, his lawyer said on Tuesday. ADVERTISEMENT Skakel, now 45, was convicted in 2002 of bludgeoning Moxley to death with one of his mother's golf clubs and was sentenced to 20 years to life in prison. In January, Skakel, 15 at the time of the murder, lost an appeal of that decision to the Connecticut Supreme Court. Skakel's lawyers filed a motion on February 14 asking the court to review...