Insanely huge initial commit

Assets/ProCamera2D/Editor/Extensions/ProCamera2DPointerInfluenceEditor.cs

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+using UnityEditor;
+using UnityEngine;
+
+namespace Com.LuisPedroFonseca.ProCamera2D
+{
+    [CustomEditor(typeof(ProCamera2DPointerInfluence))]
+    public class ProCamera2DPointerInfluenceEditor : Editor
+    {
+        public override void OnInspectorGUI()
+        {
+            if (target == null)
+                return;
+            
+            var proCamera2DPointerInfluence = (ProCamera2DPointerInfluence)target;
+            
+            if(proCamera2DPointerInfluence.ProCamera2D == null)
+                EditorGUILayout.HelpBox("ProCamera2D is not set.", MessageType.Error, true);
+                
+            DrawDefaultInspector();
+        }
+    }
+}