POS2: add iteration number to the serialized model name
POS2: add iteration number to the serialized model name

asubbaswamy/factorie,melisabok/factorie,digitalreasoning/factorie-scala-210,strubell/factorie,factorie/factorie,hlin117/factorie,zxsted/factorie,Craigacp/factorie,malcolmgreaves/factorie,joprice/factorie,pogren-oracle/factorie,patverga/factorie