qi/__init__.py: Only set dll directory if bin/ exists

This should fix importing qi from the Python SDK

Change-Id: I5d962a8a41fedcb73a82dbc1c7b5314b01b4be24
application: fallback on sys.argv when no arguments are provided

the previous behavior was error prone. specify [] to have no arguments given. (not needed in the normal case)

Change-Id: I9b532eef85d676b1390610f87484524ae0e3bd59
Reviewed-on: http://gerrit.aldebaran.lan/45753
Reviewed-by: cgestes <gestes@aldebaran-robotics.com>
Tested-by: cgestes <gestes@aldebaran-robotics.com>
strand: support them in future, signal, periodictask and async

Change-Id: I219d64fe616e1fc6e7729a1dc2899e5e1c5251a0
Reviewed-on: http://gerrit.aldebaran.lan/45736
Reviewed-by: pdaouadi <pdaouadi@aldebaran-robotics.com>
Tested-by: pdaouadi <pdaouadi@aldebaran-robotics.com>