Added orbit camera controller for game view

Play/pause toggled with SPACE
navigate camera with mouse and WASD (forward/right) + EQ (up)

Assets/Scripts/Targets/DroneTarget.cs

@@ -9,8 +9,8 @@ public class DroneTarget : Target {
   }
 
   // Update is called once per frame
-  protected override void Update() {
-    base.Update();
+  protected override void FixedUpdate() {
+    base.FixedUpdate();
   }
 
   protected override void UpdateReady(double deltaTime) {}

Assets/Scripts/Targets/Target.cs

@@ -11,7 +11,7 @@ public abstract class Target : Agent {
     base.Start();
   }
 
-  protected override void Update() {
-    base.Update();
+  protected override void FixedUpdate() {
+    base.FixedUpdate();
   }
 }