0030635: Visualization - move OpenGl_Layer to Graphic3d_Layer

0030635: Visualization - move OpenGl_Layer to Graphic3d_Layer

Renamed classes (moved from TKOpenGl to TKV3d):
- OpenGl_Layer -> Graphic3d_Layer;
- OpenGl_BVHClipPrimitiveSet -> Graphic3d_BvhCStructureSet;
- OpenGl_BVHClipPrimitiveTrsfPersSet -> Graphic3d_BvhCStructureSetTrsfPers;
- OpenGl_BVHTreeSelector -> Graphic3d_CullingTool.

Method OpenGl_Layer::Render() has been moved to OpenGl_LayerList::renderLayer().

Standard Z-layers list definition has been moved
from OpenGl_GraphicDriver to base class Graphic3d_GraphicDriver.