Add Untappd Integration

[ThomasBower]

The Untappd API allows you to perform a range of actions from checking in a beer to providing venue information.

It would be cool to have at least the following:

• Show venue information for each pub on the crawl
• Allow entry of your beer name when you checkin to the venue, which will automatically update your Untappd profile.

[KMayne]

It might be easier to automatically read the user's feed from Untappd to detect when they've checked into a pub https://untappd.com/api/docs#useractivityfeed