Add ticking stub for effect.

Assets/Cryville/Crtr/EffectInstance.cs

@@ -38,6 +38,9 @@ namespace Cryville.Crtr {
 		float _duration;
 		readonly PropOp _durationOp;
 		public double EndTime { get { return _startTime + _duration; } }
+		public void Tick() {
+			_skinContainer.MatchDynamic(this, 1);
+		}
 		public void OnEmit(double time) {
 			_startTime = time;
 			RootTransform.gameObject.SetActive(true);