0024131: TKOpenGL redesign GPU memory management for markers presentation

Introduce Point Sprites usage.
Graphic3d_Group - drop Marker(),MarkerSet() methods - markers should be drawn using AddPrimitiveArray.
Added new Draw Harness commands vcaps, vmarkerstest.

src/OpenGl/Handle_OpenGl_PointSprite.hxx

@@ -0,0 +1,28 @@
+// Created on: 2013-08-26
+// Created by: Kirill GAVRILOV
+// Copyright (c) 2013 OPEN CASCADE SAS
+//
+// The content of this file is subject to the Open CASCADE Technology Public
+// License Version 6.5 (the "License"). You may not use the content of this file
+// except in compliance with the License. Please obtain a copy of the License
+// at http://www.opencascade.org and read it completely before using this file.
+//
+// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
+// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
+//
+// The Original Code and all software distributed under the License is
+// distributed on an "AS IS" basis, without warranty of any kind, and the
+// Initial Developer hereby disclaims all such warranties, including without
+// limitation, any warranties of merchantability, fitness for a particular
+// purpose or non-infringement. Please see the License for the specific terms
+// and conditions governing the rights and limitations under the License.
+
+#ifndef _Handle_OpenGl_PointSprite_Header
+#define _Handle_OpenGl_PointSprite_Header
+
+#include <Handle_OpenGl_Texture.hxx>
+
+class OpenGl_PointSprite;
+DEFINE_STANDARD_HANDLE(OpenGl_PointSprite, OpenGl_Texture)
+
+#endif // _Handle_OpenGl_PointSprite_Header