add SoftDemo examples

add example description for all examples (with word-wrap)
add the VoronoiFractureDemo, note that the collision are disabled after breaking constraints.
add optional GwenOpenGLTest, to make it easier to see Gwen user interface features.

test/GwenOpenGLTest/premake4.lua

@@ -0,0 +1,68 @@
+
+	project "Test_Gwen_OpenGL"
+		
+	kind "ConsoleApp"
+	flags {"Unicode"}
+	
+	defines { "GWEN_COMPILE_STATIC" , "_HAS_EXCEPTIONS=0", "_STATIC_CPPLIB" }
+	defines { "DONT_USE_GLUT"}
+	
+	targetdir "../../bin"
+	
+	includedirs 
+	{
+	
+		"../../examples/ThirdPartLibs/Gwen",
+		".",
+	}
+
+	initOpenGL()
+	initGlew()
+			
+	links {
+		"gwen",
+	}
+	
+	
+	files {
+		"../../examples/OpenGLWindow/OpenSans.cpp",
+		"../../examples/OpenGLWindow/TwFonts.cpp",
+		"../../examples/OpenGLWindow/TwFonts.h",
+		"../../examples/OpenGLWindow/LoadShader.cpp",
+		"../../examples/OpenGLWindow/LoadShader.h",
+		"../../examples/OpenGLWindow/GLPrimitiveRenderer.cpp",
+		"../../examples/OpenGLWindow/GLPrimitiveRenderer.h",				
+		"../../examples/OpenGLWindow/GwenOpenGL3CoreRenderer.h",
+		"../../examples/OpenGLWindow/fontstash.cpp",
+		"../../examples/OpenGLWindow/fontstash.h",
+		"../../examples/OpenGLWindow/opengl_fontstashcallbacks.cpp",
+ 		"../../examples/OpenGLWindow/opengl_fontstashcallbacks.h",
+		"../../examples/Utils/b3Clock.cpp",
+		"../../examples/Utils/b3Clock.h",
+		"**.cpp",
+		"**.h",
+	}
+	if os.is("Windows") then
+	files {
+		"../../examples/OpenGLWindow/Win32OpenGLWindow.cpp",
+                "../../examples/OpenGLWindow/Win32OpenGLWindow.h",
+                "../../examples/OpenGLWindow/Win32Window.cpp",
+                "../../examples/OpenGLWindow/Win32Window.h",
+	}
+	end
+	if os.is("Linux") then 
+		initX11()
+		files{
+		"../../examples/OpenGLWindow/X11OpenGLWindow.h",
+		"../../examples/OpenGLWindow/X11OpenGLWindow.cpp"
+		}
+		links{"pthread"}
+	end
+	if os.is("MacOSX") then
+		links{"Cocoa.framework"}
+print("hello!")
+		files{
+		"../../examples/OpenGLWindow/MacOpenGLWindow.mm",
+		"../../examples/OpenGLWindow/MacOpenGLWindow.h",
+		}
+	end