Automatically import events from meetup.com

[datapythonista]

There are many user groups that use meetup to organize the events. It's a waste of time for the community that the organizers need to submit them to be added to python.org, and that moderators need to approve them.

After #1172 is implemented, a list of trusted meetup groups will be available. We can have a command scheduled with cron once per day (or a better frequency). It'll check all the trusted meetup groups in the database, and will add the new events to the Google calendars.

The API to access meetup is explained here: https://www.meetup.com/meetup_api/
And the API for Google calendars is explained here: https://developers.google.com/google-apps/calendar/

[jazzmuesli]

I made an attempt to import meetup events using meetup API, but it needs to be imported into django/etc.
Here is what it produces:

• name of the event: Node.js Meetup London/Looking for a job in London / looking for node.js developers? www.upandfront.com
• type of event: *** meetup
• focus on Python:

  If you're a company looking to hire from among our members or a member looking for a new job, please use http://www.upandfront.com. We want to keep the meetups about code only.

• approximate number of attendees: 1
• location (incl. country): unknown
• dates/times/recurrence (incl. time zone): 2019-01-01 19:00:00
• link (in HTML format): Looking for a job in London / looking for node.js developers? www.upandfront.com

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