Update index.md

Author: ericelliott

categories/augmented-reality/index.md

@@ -4,6 +4,7 @@
 * [W3C Augmented Reality Community Group](https://www.w3.org/community/ar/)
 
 ## Code
+* [WebVR Boilerplate](http://smus.com/responsive-vr/)
 * [W3C AR Community Demos](https://www.w3.org/community/ar/demos-and-projects/)
 * [Tracking.js](https://github.com/eduardolundgren/tracking.js/) Computer vision library with several algorithms to choose from #code
 * [awe.js](https://github.com/buildar/awe.js) Location, Marker, Oculus Rift, Leap, Google Glass, texture mapped projections #code