Fix MathUtils.LerpVector2, add cameras.

DaggerFramework/Source/Rendering/StandardRenderer.cs

@@ -166,6 +166,17 @@ namespace DaggerFramework.Rendering
             throw new NotImplementedException();
         }
 
+        public override void BeginCamera2d(Vector2 offset, Vector2 target, float rotation, float zoom)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void EndCamera2d()
+        {
+            throw new NotImplementedException();
+        }
+
+
         private GL _gl;
         private Glfw _glfw;
         private unsafe WindowHandle* _windowHandle;