Add mailing lists for mods to send emails to players

[tiffanynwyeung]

Right now mods are using BCC on a large list of emails for sending messages to humans and zombies, which has come up with its own crop of issues. With how this term's email system has broken down to bugs, delays, blocked messages, and much more (thanks Gmail?), I think we need to revisit adding players to the CSC mailing lists so they have only one email address to send to, and also perhaps Gmail won't just block the emails either. @tso want your opinion on this.