What was the name given to a controversy about vivisection in England from 1903 to 1910 that involved the infiltration of University of London medical lectures by Swedish women activists, street battles between medical students and suffragettes, trade unionists and the police, police protection for the statue of a dog in Battersea Park, its removal by the authorities in 1910 (and its replacement in 1985), a libel trial and the establishment of a Royal Commission?