title: PSR4 auto load without composer
body: <p>I have one package in a project which is autoloaded using composer and composer.json entry is as follows : </p>
  
  <pre><code> "autoload": {
        "psr-4": {
          "CompanyName\\PackageName\\": "packages/package-folder/src/"
      }
    }
  </code></pre>
  
  <p>Now I am copying this over to another project which is not using composer. How can I autoload this same package there ?</p>