removing pyaudio completely
Deleting ahub and aio interface to soundcard

TODO create similar integration tests
for webhub using sockets or REST api (turn based speech api)
which is in preparation
Fix nlg testcase for czech and skip pykaldi modul

TODO fixes:
ml/mlr.py: The tests there have unclear test data format and fail
tests/test_category_labels_substitution.py: Is outdated however
I have no clue how to build a new corresponding test case myself