frontpage.txt: add discussion of version numbers and minor wording improvements.
frontpage.txt: add discussion of version numbers and minor wording improvements.

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