site: cleaned and improved README slightly
site: cleaned and improved README slightly

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