WebXR call agenda, May 29th 2018

Sending the agenda out early this week because Monday is a US holiday and
if I wait till then I'm certain to forget to send one. And that would be
bad, because we've got a ton of pull requests to cover this week!

*Call Agenda Items:*

   - Renamed pointerOrigin and enum values to reflect usage pattern, not
   device type. (#342 <https://github.com/immersive-web/webxr/pull/342>)
   - Created an explicit XRRay type (#357
   <https://github.com/immersive-web/webxr/pull/357>)
   - Specify timing/behavior of the resetpose event (#358
   <https://github.com/immersive-web/webxr/pull/358>)
   - Add text explaining the depth range values. (#359
   <https://github.com/immersive-web/webxr/pull/359>)
   - Clarified when exclusive sessions are rejected (#360
   <https://github.com/immersive-web/webxr/pull/360>)
   - Removed multiview attribute from XRWebGLLayer (#361
   <https://github.com/immersive-web/webxr/pull/361>)

Please reply with any additional items you'd like to see addressed.

*Call date:* Tuesday, May 29th (and every other Tuesday thereafter)
*Call time:* 1:00 PM PST for one hour

WebEx call details are posted to the internal-webvr@w3.org mailing list,
accessible to any community group member.