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/ImagePanel.cpp

@@ -0,0 +1,32 @@
+#include "UnitTest.h"
+#include "Gwen/Controls/ImagePanel.h"
+
+using namespace Gwen;
+
+class ImagePanel : public GUnit
+{
+	public:
+
+	GWEN_CONTROL_INLINE( ImagePanel, GUnit )
+	{
+		// Normal
+		{
+			Controls::ImagePanel* img = new Controls::ImagePanel( this );
+			img->SetImage( L"gwen.png" );
+			img->SetBounds( 10, 10, 100, 100 );
+		}
+
+		// Missing
+		{
+			Controls::ImagePanel* img = new Controls::ImagePanel( this );
+			img->SetImage( L"missingimage.png" );
+			img->SetBounds( 120, 10, 100, 100 );
+		}
+
+	}
+
+};
+
+
+
+DEFINE_UNIT_TEST( ImagePanel, L"ImagePanel" );