ipaaca-iu-sniffer optionally takes a list of category arguments
(if not specified, it still listens for everything).
ipaaca-iu-injector needs to be provided with a category name
and, optionally, with key-value pairs for the payload, as such:
$ ipaaca-iu-injector  murmlfile  data  smile_3sec.us

Conflicts:
	ipaacalib/python/test/src/testnotifier.py

Make sure to update rsb simultaneously.

also reduced verbosity for python and fixed the c++ test build settings

notifier.py is now in ipaaca.util

- fixed typo in ipaaca documentation

- made sure the initializer is only initialized once
- toString methods for payload and localIU

- Minor cleanups