Tweaks to existing scripts

* FacebookBulkImporter - create new - doesn't create new files it adds to existing file reset button added which deletes all csv files - confirmation required "are you sure you want to delete all files?" create new file - should allow me to choose what it is to be named load exisiting file - can this be a dropdown menu choice? Make sure script is definetly grabbing all university and network fields. *FacebookFanInviter - Not inviting friends to become a fan. Make sure person is only invited once. If one account invites them, and friends on another account, not invited again. Remove as fan at end.