Float32Array is not supported in IE9

`Float32Array` is not supported in IE9 and older versions. Typed Arrays are not supported in said versions generally speaking. I know that this repository is supposed to detect device orientation + motion, but when it sits on a web page, it still gets executed on IE9 and older.

This is the problematic line: https://github.com/adtile/Full-Tilt/blob/master/dist/fulltilt.js#L426
