Update index.md

Author: ericelliott

categories/augmented-reality/index.md

@@ -9,3 +9,4 @@
 * [awe.js](https://github.com/buildar/awe.js) Location, Marker, Oculus Rift, Leap, Google Glass, texture mapped projections #code
 * [clmtrackr](https://github.com/auduno/clmtrackr) Facial feature tracking #code
 * [Gest.js](https://github.com/hadimichael/gest.js) Gesture recognition #code
+* [Vizor.io](http://vizor.io/) Web-based OSS VR content editor #code