title: Xcode - Unable to install library via pods
body: <p>I am trying an example of SocketRocket and have installed the library using "pod install" that return "Integrating client project". But, building the project, it fails with the message:</p>
  
  <pre><code>&gt; diff: /../Podfile.lock: No such file or directory diff:
  &gt; /Manifest.lock: No such file or directory error: The sandbox is not in
  &gt; sync with the Podfile.lock. Run 'pod install' or update your CocoaPods
  &gt; installation.
  </code></pre>
  
  <p>In the directoty are present the Podfile and the Podfile.lock.</p>
  
  <p>Podfile is:</p>
  
  <pre><code>source 'https://github.com/CocoaPods/Specs.git'
  
  platform :ios, "7.0"
  
  pod "SocketRocket"
  </code></pre>
  
  <p>Any help, please?</p>