Began trying to fix primitive batch. Added a default camera to the configuration.

RecrownedAthenaeum/Render/RectangleRenderer.cs

@@ -29,7 +29,7 @@ namespace RecrownedAthenaeum.Render
         /// Begins the render batch.
         /// </summary>
         /// <param name="filled">Whether or not to fill the rectangle.</param>
-        public void Begin(bool filled)
+        public void Begin(bool filled = false)
         {
             filling = filled;
             if (began) throw new InvalidOperationException("Cannot begin twice.");
@@ -75,7 +75,8 @@ namespace RecrownedAthenaeum.Render
                 primitiveBatch.AddVertex(corners[2], color);
                 primitiveBatch.AddVertex(corners[0], color);
                 primitiveBatch.AddVertex(corners[3], color);
-            } else
+            }
+            else
             {
                 primitiveBatch.AddVertex(corners[0], color);
                 primitiveBatch.AddVertex(corners[1], color);