Need a delete room function

[rizen]

Moderators should be able to delete public rooms from the rooms list. I'm thinking just a × symbol that is linked to a delete function in the rooms list.

[rizen]

Added the function. Still need 3 things.

1) Update rules to allow moderators to make the necessary changes to the db.

2) Don't allow moderators to delete official rooms.

3) Set up a .on('child_removed') to update all user clients to get the users out of those rooms.

[rizen]

Done