title: Omniauth facebook request friends uid
body: <p>I am a rails newbie and I have followed Railscasts Episodes 235 and 236 regarding logging in with Omniauth. I have made it so a user can connect with Facebook and it grabs his email and his uid. However, i would like to grab his friends uid too. What i would like is a feature on my application so users can see their friends, from Facebook, who are using my application too. How can I accomplish this?</p>