A new GUI

The first version of a graphical user interface has been implemented.
The constellation of the system could be read out by a rgb-camera view
or by the views of the Kinect (rgb- and depth-image) as well as in the simulation view of OpenRAVE and some additional information that is provided like a list of the known objects and there content. To create the GUI we decided to use Qt. This is a cross-platform application framework which provides a quite intuitive way to this.