[TASK] Initial commit with basic product setup

Assets/Mapbox SDK/Mapbox/Unity/Utilities/DontDestroyOnLoad.cs

@@ -0,0 +1,24 @@
+namespace Mapbox.Unity.Utilities
+{
+	using UnityEngine;
+
+	public class DontDestroyOnLoad : MonoBehaviour
+	{
+		static DontDestroyOnLoad _instance;
+
+		[SerializeField]
+		bool _useSingleInstance;
+
+		protected virtual void Awake()
+		{
+			if (_instance != null && _useSingleInstance)
+			{
+				Destroy(gameObject);
+				return;
+			}
+
+			_instance = this;
+			DontDestroyOnLoad(gameObject);
+		}
+	}
+}