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/Numeric.cpp

@@ -0,0 +1,31 @@
+#include "UnitTest.h"
+#include "Gwen/Controls/NumericUpDown.h"
+
+using namespace Gwen;
+
+class Numeric : public GUnit
+{
+	public:
+
+	GWEN_CONTROL_INLINE( Numeric, GUnit )
+	{
+
+		Controls::NumericUpDown* pCtrl = new Controls::NumericUpDown( this );
+		pCtrl->SetBounds( 10, 10, 50, 20 );
+		pCtrl->SetValue( 50 );
+		pCtrl->SetMax( 1000 );
+		pCtrl->SetMin( -1000 );
+
+		//	pCtrl->onPress.Add( this, &ThisClass::onButtonA );
+	}
+
+	void onButtonA( Controls::Base* pControl )
+	{
+	//	UnitPrint( L"Button Pressed (using 'OnPress' event)" );
+	}
+
+};
+
+
+
+DEFINE_UNIT_TEST( Numeric, L"Numeric" );