Graphic3d_CBounds was replaced by Graphic3d_BndBox4f
Update of OCCT samples source code due to moving to LGPL license
VoxelDemo is modified to be compliant with OCC 6.5.4 Update of environment files and VS projects.
Removal of VoxelClient VoxelDemo sample is redesigned so that it doesn't require compilation of OpenGl classes. It refers to TKOpenGl.dll as to an external library. Some minor bugs are fixed in OCAF and Viewer 3d standard MFC samples