title: Using Composer to get github repo with Kohana fails: "requested package could not be found"
body: <p>I would like to use Composer to include the <a href="https://github.com/feelinglucky/php-readability.git">php readability git</a> project. This is my <code>composer.json</code> file:</p>
  
  <pre><code>{
      "repositories": [
          {
              "type": "package",
              "package": {
                  "name": "php-readability/php-readability",
                  "version": "master",
                  "source": {
                      "url": "https://github.com/feelinglucky/php-readability.git",
                      "type": "git",
                      "reference": "branches/master"
                  }
              }
          }
      ],
      "require": {
          "php-readability/php-readability": "master"
      }
  }
  </code></pre>
  
  <p>The error I get is:</p>
  
  <pre><code>Problem 1
   - The requested package php-readability/php-readability master could not be found.
  
  Potential causes:
   - A typo in the package name
   - The package is not available in a stable-enough version according to your min
  imum-stability setting
     see &lt;https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/discussion&gt; f
  or more details.
  
  Read &lt;http://getcomposer.org/doc/articles/troubleshooting.md&gt; for further common
   problems.
  </code></pre>
  
  <p>This is my first time using Composer so it is likely my config is wrong!</p>