BP: default null DiffList for BPSummary.setToMaximize
BP: default null DiffList for BPSummary.setToMaximize

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