Turn on native scrolling for iOS6+

[davebalmer]

Currently using the JS/CSS fallback scroller.

[kesne]

This should be pretty easy to implement. I played around with adding iphone and ipad to the nativescroll checker and things worked out pretty well. There's one issue that's pretty well documented dealing with scrolling in views at the top and bottom. It seems like there's a decently simple way to hack around the issue though, as ScrollFix does it relatively simply.

[davebalmer]

Yup, just have to turn it on. :)