Improve information about creating anonymous Jabber and email accounts

[micahflee]

The Workflow section, at the bottom of the Tails section, briefly mentions making anonymous Jabber and email accounts. I think this should be fleshed out more because it's actually much more difficult and annoying that it seems.

Also, I think Workflow should be it's own major section.

For Jabber, I mention going to https://register.jabber.org/ to create a new Jabber account, but they disabled new account creation awhile ago. There's a list of public Jabber servers here http://xmpp.net/, and many of them require you to use your chat client to do account creation, and many also require you to copy and paste a URL to see a CAPTCHA. I should walk through this whole process.

For email, it turns out making an anonymous email account is a huge pain. Many email services require a phone number for account creation. Many require a secondary email address. Many don't seem to work, or at least not over Tor. Many would work fine but don't support IMAP or POP, so can't be used with Claws Mail or Thunderbird. I also don't know what email services to recommend. In this case of anonymous email services, being able to easily create an account with Tor and a fake name is more important than the security or jurisdiction of the server.