task/ta-npi-016-18 -- prepare email and SMS condition flags

nparcel/conf/nparceld.conf
* placeholders for new send_sms and send_email flags

nparcel/config.py
* update the FLAG_MAP global to support send_email and send_sms

required_facility
* new method required_facility() which check the flag conditions as a
  set and returns True if at least one of the flags is set