Update guidelines for producing and attending a live Dojo session

[gusaus]

We should provide some guidelines for producing and attending a live Dojo session on the website and other relevant places around the web.

https://github.com/DrupalOpenLearning/drupaldojo/wiki/Producing-and-attending-a-live-Dojo-session

[gusaus]

Just realized I previously created #30

Think we should leave these issues open until we get that new page set up on the site. We also probably have some revisions to add based on doing our first session!?!

[gusaus]

What we're trying to achieve here may overlap with the course @kat-wehr is in the process of outlining for the Open Ulmus/ELMS:LN intro openulmus/openulmus.org#6 (comment)