Add client read function.
Add client read function.

Change-Id: I322de239a48e2dbbfc6b6a05a0e666c8626ea497

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