Write moderator docs outline

This is essentially a copy of the list of topics from #75.
Copy in the moderator guidelines

This is missing the "Prime Directive" note, I'll discuss this with Nick later.
Add the mod/admin chat section to the moderator docs
Fill out bans & monitoring in the moderator docs

This is missing a full description of the /tp command family.
Document the griefer procedure
Document Prism logging

This records how to interact with the Prism logs, but not how to do rollbacks.
Document rollbacks in the moderator documentation
Write up client hacks section
Document the two core teleportation commands
Merge pull request #80 from prophile/moderator-docs

Moderator docs