m._print_counts() -- Print count matrix

def _print_counts(self):
        """
        m._print_counts() -- Print count matrix 
        """
        print "#  ",
        for i in range(self.width):
            print "  %4d   "%i,
        print
        for L in ['A', 'C', 'T', 'G']:
            print "#%s "%L,
            for i in range(self.width):
                print  "%8.3f "%self.counts[i][L],
            print