task/ta-npp-002-08 -- filterdaemon.py process hook

nparcel/filter.py
* updated the process() method to handle empty Agent Id's as an error

nparcel/filterdaemon.py
* updated the _start() method to handle filter.py processing loop

nparcel/conf/nparceld.conf
* placeholder for the new filter_loop config option

nparcel/mapperdaemon.py
* patch error in the _start() method where reporter object
  was calling a method instead of a property (end)

nparcel/reporter.py
* timing end can now be conditionally set with call to the report()
  method