(Reuters) – A South African judge cleared Oscar Pistorius of premeditated murder on Thursday, saying prosecutors had failed to prove the Olympic and Paralympic track star explicitly intended to kill his girlfriend on Valentine’s Day last year. Although she described the 27-year-old as a “very poor” and “evasive” witness, judge Thokozile Masipa said this did not mean the track star was necessary guilty in a case that she said was based entirely on circumstantial evidence. […]