task/ta38 -- integrate daemoniser into nparceld.py

bin/nparceld.py
* new class NparcelDaemon() which wraps the nparcel.utils.Daemon()
  functionality

utils/conf/log.conf
* write to file instead of console

utils/daemon.py
* adjustment to Close all file descriptors except from non-console
  logging handlers
Merge branch 'feature/us21' into dev