title: Install propel using composer
body: <p>I am trying to use propel with composer but I'm getting errors.</p>
  
  <p>My composer.json is:</p>
  
  <pre><code>{
      "require": {
          "propel/propel" : "*"
      }
  }
  </code></pre>
  
  <p>and the error is:</p>
  
  <pre><code>  Problem 1
      - The requested package propel/propel * could not be found.
  </code></pre>
  
  <p>Does anyone knows what am I missing? I'm googling it but I don't get it.</p>