0032551: Documentation - Novice user guide for OCCT Documentation

Added novice guide.
Improved structure of Tutorials & Samples.

samples/CSharp/ReadMe.md

@@ -1,8 +1,9 @@
-OCCT CSharp sample {#samples_csharp_occt}
+.NET: Import/Export (C#|C++/CLI|WinForms|WPF) {#samples_csharp_occt}
 ================== 
 	
 This sample demonstrates how to use OCCT libraries in <b>.Net</b> application
 written using **CSharp** and **Windows Forms** or **Windows Presentation Foundation** (WPF).
+The sample could be found within OCCT repository in folder `/samples/CSharp/`.
 
 The connection between .Net and OCCT (C++) level is provided by proxy library
 **OCCProxy**, written in C++/CLI. The proxy library contains a single *ref* class
@@ -14,6 +15,8 @@ Both applications provide the same functionality as the standard OCCT Import/Exp
 The first project is called *IE_WinForms* and uses Windows Forms for GUI.
 The second application is called *IE_WPF_WinForms* and uses Windows Presentation Foundation.
 
+@figure{samples_c__ie.png}
+
 Note a few important details:
 
 - OCCT template class *NCollection_Haft* is used to encapsulate C++ class into a field of *ref* class; 

samples/CSharp/ReadMe_D3D.md

@@ -1,8 +1,9 @@
-Direct3D CSharp sample {#samples_csharp_direct3d}
-================== 
+.NET: D3D/OpenGL Viewer (C#|C++/CLI|WPF) {#samples_csharp_direct3d}
+==================
 	
 This sample demonstrates how to use OCCT and DirectX libraries in <b>.Net</b> application
 written using **CSharp** and **Windows Presentation Foundation** (WPF).
+The sample could be found within OCCT repository in folder `/samples/CSharp/`.
 
 The connection between .Net, OCCT (C++) and DirectX level is provided by proxy libraries,
 **OCCProxy** and **D3DProxy**, written in C++/CLI. The proxy library **OCCProxy**  contains a single