add set_multiclass_label
add set_multiclass_label

hhexiy/vowpal_wabbit,hhexiy/vowpal_wabbit,hhexiy/vowpal_wabbit,hhexiy/vowpal_wabbit,hhexiy/vowpal_wabbit,hhexiy/vowpal_wabbit,hhexiy/vowpal_wabbit,hhexiy/vowpal_wabbit,hhexiy/vowpal_wabbit,hhexiy/vowpal_wabbit