title: Missing Constraint Autolayout Warning
body: <p>I have a project and I used to add constraints with xcode interface builder. In a specific case I needed to add some constraints in my controllers source. My question is that although I have the result I was seeking for, xcode returns missing constraints warnings.</p>
  
  <p>Is this something I should handle? I mean, I add constraints in the source code. Show I do something to update my storyboard in order to be aware of these?</p>