Add a new NoteSkin, double resolution to match the new theme.

stepmania/NoteSkins/dance/gamma/Down Tap Lift.lua

@@ -0,0 +1,9 @@
+local t = Def.ActorFrame {
+	Def.Sprite {
+		Texture="_arrow";
+		Frame0000=7;
+		Delay0000=1;
+		InitCommand=cmd(animate,false;pulse;effectclock,"beat";effectmagnitude,0.9,1,1);
+	};
+};
+return t;