add serialization (use yaml-cpp), add stencil to render outline for selected entity, add play mode, UUIDS, add orthographic and perspective camera, add editor camera

ExampleApp/Src/Sink.cs

@@ -0,0 +1,27 @@
+using Prism;
+
+namespace Example
+{
+    class Sink : Entity
+    {
+
+        public float SinkSpeed = 1.0f;
+
+        void OnCreate()
+        {
+
+        }
+
+        void OnUpdate(float ts)
+        {
+            Mat4 transform = GetTransform();
+            Vec3 translation = transform.Translation;
+
+            translation.Y -= SinkSpeed * ts;
+
+            transform.Translation = translation;
+            SetTransform(transform);
+        }
+
+    }
+}