📖 Added documentation, Minor code cleanup

Author: dolejska-daniel

Documentation/Documentation.pdf

@@ -0,0 +1,11 @@
+using Quadtree.Items;
+using UnityEngine;
+
+namespace Quadtree
+{
+    [ExecuteInEditMode]
+    [AddComponentMenu("Spatial partitioning/Quadtree/Root node (for GameObjects)")]
+    public class GameObjectQuadtreeRoot : QuadtreeMonoRoot<GameObjectItem, Node<GameObjectItem>>
+    {
+    }
+}

Documentation/Documentation.pdf.meta

@@ -1,11 +1,10 @@
 
+using UnityEngine;
+
 namespace Quadtree.Items
 {
     public abstract class GameObjectItem : GameObjectItemBase<GameObjectItem, Node<GameObjectItem>>
     {
-        protected override GameObjectItem This()
-        {
-            return this;
-        }
+        protected override GameObjectItem This() => this;
     }
 }