Self-organizing meetups

[pavelsinkevich]

Idea: self-organizing meet-and-greet events during the EF.
Users can organize them on the fly when they have nothing else to do.
Roles: host, guest, admin

As a GUEST, I want:

• to see list of ongoing and future meetups
• add meetup to my personal calendar

As a HOST, I want:

• to add new meetup to the list, specify topic, location, start time, expected duration, additional details.
  Example: "Let's discuss Godzilla movies!"; location: park; additional details: link to Google maps coordinates; start time: 14:00, expected duration: 1 hour
• see how many people added my meetup to their calendars
• update my meetup, if location or time has changed
• delete my meetup, if I changed my mind

As an ADMIN, I want:

• to delete meetups with inappropriate topic or description
• to ban user from creating new meetups for X hours, if they don't behave