libQGLViewer: New program

libQGLViewer: New program

* Starting with libQGLViewer 2.3.8
* libqglviewer (also known as libQGLViewer) is a free C++ library based on
*  Qt that enables the quick creation of OpenGL 3D viewers. It features a
*  powerful camera trackball and simple applications simply require an
*  implementation of the draw() function. It is a tool of choice for OpenGL
*  beginners and assignements. It provides screenshot saving, mouse
*  manipulated frames, stereo display, interpolated keyFrames, object
*  selection, and much more. It is fully customizable and easy to extend to
*  create complex applications, with a possible Qt GUI.

Signed-off-by: Jayen Ashar <jayen@cse.unsw.edu.au>
Signed-off-by: Khem Raj <raj.khem@gmail.com>