Python 3 port, the basics are working.

ipaacalib/python/src/informer.py

ipaacalib/python/src/ipaaca/backend.py

ipaacalib/python/src/ipaaca/buffer.py

ipaacalib/python/src/ipaaca/converter.py

ipaacalib/python/src/ipaaca/iu.py

ipaacalib/python/src/ipaaca/payload.py

ipaacalib/python/src/ipaaca/util/__init__.py

ipaacalib/python/src/ipaaca/util/logger.py

ipaacalib/python/src/listener.py