title: How to reverse a binary number?
body: <p>I'm newbie in Golan, this should be an easy question for experienced golang devs. I try to do the <a href="https://stackoverflow.com/questions/15180168/slick-way-to-reverse-the-binary-digits-of-a-number-in-python">same test from Spotify</a> to see how fast we can go in Golang :) </p>