title: Installing iOS 8.0 in Xcode 6.1
body: <p>After I upgraded the Xcode 6 to Xcode 6.1 I lost the simulators running iOS 8.0. 
  Do you know a way to have them back?
  I tried to create a new simulator, but it doesn't work.
  <img src="https://i.stack.imgur.com/xkAch.gif" alt="create new ios simulator"></p>