Added eleVR player

On Friday Sept 26, Diego and I sat down with Andrea and Vi from eleVR and did a rough integration of their player into JAVRIS, by dropping it into content and wiring up vrclient.js and VRClient.ready(). It seems to work. Next steps are to add VR controls to eleVR player (which they are looking into), and ideally make this work from an external repo, instead of needing to place in JAVRIS/content.