Update examples and README.md

[johnshaughnessy]

From discord:
[4:12 PM] Dan Sinni: It seems the example might be outdated, FYI. Not sure if it would be worth it to update that as well.
[4:12 PM] Dan Sinni: Both in the README.md file and in examples/index.html
[4:13 PM] Dan Sinni: It's not very clear which networked-aframe should be used, among some others.

[gabrieljbaker]

Curious if any possible ETA on this @johnshaughnessy .

Would be very interested to see an example of the janus adapter working in a NAF project outside of the hubs context.

[arpu]

there is this small example https://github.com/mozilla/naf-janus-adapter/blob/master/examples/index.html

and i use it on https://vrland.io/app ( not open source for now :/ )

[gabrieljbaker]

@arpu , I just reached out to you on twitter about this. :)

[kylebakerio]

That example is the one that is out of date. Aframe 0.8...

[vincentfretin]

FYI I updated the README and the example in my fork on master and 3.0.x branches
https://github.com/Synantoo/naf-janus-adapter