python: document the qi package
python: document the qi package

Change-Id: Ib7e8d6111f9cdafad21974c6d5a758aaff62e59a

aldebaran/libqi,vbarbaresi/libqi,aldebaran/libqi,aldebaran/libqi-java,aldebaran/libqi-java,bsautron/libqi,aldebaran/libqi,aldebaran/libqi-java