Add support for iOS 8

[rsanchezsaez]

Since iOS 8, Mobile Safari supports WebGL. The Google VR demos work great.

It would be nice if the Try it pages would work on iOS 8 as well. Currently they show a blank screen.

[calucido]

The issue seems to be that iOS doesn't allow browsers to access the camera as part of the webpage, like desktop browsers do. I don't think there's a way around this unless Apple decides to allow it, though you could try using PhoneGap and the iOS Camera API (I have no experience with either).