title: Can't upgrade cocoapods from 1.0.0 to 1.0.1
body: <blockquote>
    <p>$ gem update cocoapods</p>
    
    <p>Updating installed gems</p>
    
    <p>Nothing to update</p>
    
    <p>$ pod --version</p>
    
    <p>1.0.0</p>
  </blockquote>
  
  <p>==========================================</p>
  
  <blockquote>
    <p>$ gem install cocoapods</p>
    
    <p>Successfully installed cocoapods-1.0.1</p>
    
    <p>Parsing documentation for cocoapods-1.0.1</p>
    
    <p>Done installing documentation for cocoapods after 3 seconds</p>
    
    <p>1 gem installed</p>
    
    <p>$ pod --version</p>
    
    <p>1.0.0</p>
  </blockquote>
  
  <p>How can I upgrade to 1.0.1?</p>
  
  <p>=======</p>
  
  <p>I think the problem is I installed two cocoapods via <code>sudo gem install cocoapods</code> and <code>gem install cocoapods</code><br>
  So I remove all of them and install again, the version is correct now.</p>