Spec updated and this project nolonger works. getVRDevices -> getVRDisplays

[theepicsnail]

This project doesn't seem to be clone-and-go anymore since a spec change. I'm using the chromium build downloadable from https://webvr.info/

The current spec uses "getVRDisplays" https://w3c.github.io/webvr/#interface-navigator

The current code uses "getVRDevices" https://github.com/hawksley/webVR-boilerplate/blob/master/js/vr/VREffect.js#L43

It may just be that this needs to update the snapshots taken, i'm unsure!