Adding 2 more properties

I have added properties for the other 2 vertexes of the Rectangle, the upperRight and the lowerLeft vertexes.

color.d

@@ -1480,15 +1480,29 @@ struct Rectangle {
 		this(upperLeft.x, upperLeft.y, upperLeft.x + size.width, upperLeft.y + size.height);
 	}
 
-	///
-	@property Point upperLeft() {
-		return Point(left, top);
-	}
+    ///
+    @property Point upperLeft()
+    {
+        return Point(left, top);
+    }
 
-	///
-	@property Point lowerRight() {
-		return Point(right, bottom);
-	}
+    ///
+    @property Point upperRight()
+    {
+        return Point(right, top);
+    }
+
+    ///
+    @property Point lowerLeft()
+    {
+        return Point(left, bottom);
+    }
+
+    ///
+    @property Point lowerRight()
+    {
+        return Point(right, bottom);
+    }
 
 	///
 	@property Size size() {