update busconfig
update exception
remove log pollution
use constants instead of magic strings
condense exception catching
remove config.default_config
Merge branch 'refactor-bus-interface-2'
Merge branch 'master' into skeleton-daemon

* master:
  remove config.default_config
  condense exception catching
  use constants instead of magic strings
  remove log pollution
  update exception
  update busconfig

Conflicts:
	xivo_bus/ctl/config.py
	xivo_bus/ctl/consumer.py