Added TKOpenGlTest and TKD3DHostTest Draw Harness plugins.
TKOpenGlTest is automatically loaded by ViewerTest::ViewerInit().
Commands vgldebug, vvbo, vcaps and vuserdraw have been moved to TKOpenGlTest.
New command vglshaders lists GLSL programs defined by OpenGl_GraphicDriver,
previously implemented by "vshaderprog -list".
Added new command vdriver for graphic driver selection.
Removed erroneous code from command vstereo.
OpenGl_Caps - flag ffpEnable is now initialized to false on desktop OpenGL.
OpenGl_Context::init() - now prints error if OpenGL version does not support GLSL
and switches OpenGl_Caps::ffpEnable to true.
update test cases
- Graphic3d_CGraduatedTrihedron: moved to Graphic3d_GraduatedTrihedron, added Graphic3d_AxisAspect for axes parameters
- OpenGl_GraduatedTrihedron: moved to primitive arrays, used Graphic3d_GraduatedTrihedron to store parameters
- ViewerTest: corrected vgraduatedtrihedron, added new parameters
- Graphic3d_ArrayOfPrimitives: added AddVertex (Graphic3d_Vec3)
- Graphic3d_GraphicDriver::GraduatedTrihedronMinMaxValues corrected interface
