Updated FB messnger parser to be in sync with the latest artifact helper class definition and api.
Updated FB messnger parser to be in sync with the latest artifact helper class definition and api.

rcordovano/autopsy,esaunders/autopsy,wschaeferB/autopsy,rcordovano/autopsy,esaunders/autopsy,wschaeferB/autopsy,esaunders/autopsy,wschaeferB/autopsy,wschaeferB/autopsy,rcordovano/autopsy,rcordovano/autopsy,wschaeferB/autopsy,rcordovano/autopsy,esaunders/autopsy,esaunders/autopsy,rcordovano/autopsy