The Berkeley mayor's race promises a dramatic reprise this year with a rematch between incumbent Tom Bates and the former mayor he unseated in a hard-fought election six years ago, Shirley Dean.The mayor's race normally is every four years, but Bates' current term is ending in two years because of a charter amendment that moved the vote for mayor to presidential election years.Missing from the race will be Zachary Running Wolf, an outspoken advocate for the Cal stadium tree-sitters who ran unsuccessfully for mayor two years ago. He declared his candidacy again this year and filed papers, but he lacked...