(This is a Berlin clone of the original NYC Hack and Tell Meetup Group!) If you've ever visited Hacker News, you've almost certainly seen the "Show HN" or "Ask HN" posts. Well, it's time to get off the Internet and tell us about it face to face. We'll provide you with our honest feedback, you provide us with a great hack, or idea. We'll give you 5 minutes to show off your tool, hack, library (did you just write a library to access the Meetup API in Go!?), whatever. We're language and software/ha …