Moved meetups to news section; tagged all meetups; added meetups to s…

[jdamerow]

I hope I did this right. I changed the following:

• Moved all meetup posts to news folder.
• Tagged all meetups as meetups
  • For past meetup announcement posts where a post about the meetup with recording existed, I tagged the announcement of the meetup as meetup and the announcement as announcement
  • For current meetup announcement (where we don't have the recording post afterwards anymore), I tagged the announcement as meetup.
• I've added the last 5 meetups to the sidebar
• I've added a "meetup" property to the past fews meetups that is shown in the sidebar
• I've added a "registration" property to the current meetup announcement
• The post page now shows meetup date and registration link if there is one at the top

See what you think :)

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