Pull up clip from judge definition. Add clip to event container.

Assets/Cryville/Crtr/Clip.cs

@@ -0,0 +1,10 @@
+namespace Cryville.Crtr {
+	public struct Clip {
+		public float Behind { get; set; }
+		public float Ahead { get; set; }
+		public Clip(float behind, float ahead) {
+			Behind = behind;
+			Ahead = ahead;
+		}
+	}
+}