style(slideBox): lower the speed a little bit

js/angular/controller/slideBoxController.js

@@ -208,7 +208,7 @@ function(scope, element, $$ionicAttachDrag, $interval) {
     // Select a new slide if it's avaiable
     if (self.isInRange(nextIndex)) {
       var transitionDuration = Math.min(
-        slidesParent.prop('offsetWidth') / (3 * velocity),
+        slidesParent.prop('offsetWidth') / (velocity),
         SLIDE_TRANSITION_DURATION
       );
       self.select(nextIndex, transitionDuration);