Added offset to be used instead of origin in spritebatch does things I don't want it to do. Also added a project to more easily test this library.

RecrownedAthenaeum/Render/RectangleRenderer.cs

@@ -106,5 +106,15 @@ namespace RecrownedAthenaeum.Render
 
             primitiveBatch.Flush();
         }
+
+        /// <summary>
+        /// Draws the given rectangle.
+        /// </summary>
+        /// <param name="rectangle">Uses the x, y and dimensions to draw a rectangle.</param>
+        /// <param name="color">The color of the rectangle.</param>
+        public void Draw(Rectangle rectangle, Color color)
+        {
+            Draw(rectangle.X, rectangle.Y, rectangle.Width, rectangle.Height, color);
+        }
     }
 }