bp: caching of indices for faster score lookup
bp: caching of indices for faster score lookup

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