minor utility funcs to serializer
minor utility funcs to serializer

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