title: timeIntervalSince1970 issue in Swift 3
body: <p>Just switched to swift 3.0 after 30 minutes of error fixes I finally got it down to one error</p>
  
  <pre><code>let timeStamp = NSNumber(Int(Date().timeIntervalSinceNow))
  //error: Argument Labels(_:)'do not match any available overloads
  </code></pre>
  
  <p>Not sure what this means because I never ran into this issue. I have this function wrapped in a <code>fileprivate function(_propterties [String: AnyObject]){}</code></p>
  
  <p>Thanks. Looks like I have a lot to learn with swift 3.0</p>