task/ta-npi-016-06 -- integrate the conditions map with the
nparcel.loader.process() method

nparcel/config.py
* introduced the global FLAG_MAP which maintains a list of flags and
  their index offset in the configuration file
* new method condition_map() which returns the Business Unit condition
  map values

nparcel/loader.py
* process() and table_column_map() method has a new cond_map attribute
  which relates to the Business Unit's condition flags
* set_default_equals() method has new boolean attribute,
  item_number_excp which translates to the BU's item_number_excp
  condition flag value

nparcel/loaderdaemon.py
* refactor the _start() method to be more optimal
* loader.process() call in the _start() method now incorporates the
  condition_map flag data structure