Update velocity-animate.d.ts

Adding support for the "scroll" effect and related option parameters. See http://julian.com/research/velocity/#scroll

velocity-animate/velocity-animate.d.ts

@@ -58,5 +58,7 @@ declare module jquery.velocity {
 		delay?: any;
 		mobileHA?: boolean;
 		_cacheValues?: boolean;
+		container?: JQuery;
+		axis?: string;
 	}
 }