task/ta-nst-011-14 -- translate BU ID to string

nparcel/auditer.py
* new method _translate_bu() to translate the BU ID to the
  Business Unit name string

nparcel/reporterdaemon.py
* update the start() method -- call to the Uncollected()
  class initialisation includes bu_ids dictionary

nparcel/uncollected.py
* update process() method -- call call to _translate_bu()