Hyperactive

I've just been trying to compile a list of email addresses for the groups on the london site, and some of them are hard to track down. Groups don't generally include their homepage and contact necessarily, so it would be good to add these two as fields when creating a group. I guess the website can not be required as they may not have a website, for the email address, I think it's fair to ask for one for groups, but we could give people the option to decide whether it should be public or not.

In addition, we could think about having an email list with all the groups contacts on it, and allow other users who have an account to subscribe to that. It might be useful for technical announcements, informing people about new features and developments on the site etc...