Fix IE9: Incorrectly detects support for 3D Transforms

Not exactly sure why (perhaps jQuery version?), but iosSlider's `has3DTransform` method is returning `true` in IE9, [when it should should `false`](http://caniuse.com/#feat=css-transitions).  This patch corrects that behavior using the established user-agent checks.

![screen shot 2014-08-25 at 12 25 12 pm](https://cloud.githubusercontent.com/assets/245860/4035259/9378267e-2c8d-11e4-9f97-6975483a27b9.png)