LOS ANGELES (Reuters) – Madonna, who had already voiced her support for the Russian punk band Pussy Riot, on Saturday joined a chorus of celebrities in slamming a jail sentence handed down in Moscow to three women from the group over a protest against President Vladimir Putin. "I protest the conviction and sentencing of Pussy Riot to a penal colony for two years for a 40-second performance extolling their political opinions," Madonna said in a statement. …