title: how to include typescript module declarations
body: <p>I have the following declarations:</p>
  
  <pre><code>declare var __DEV__: boolean;
  declare var BROWSER: boolean;
  </code></pre>
  
  <p>If I have these in an <code>index.d.ts</code> file then how do I bring this into a project?</p>
  
  <p>If I do this:</p>
  
  <pre><code>import '../../../../types/index.d.ts';
  </code></pre>
  
  <p>I get this error:</p>
  
  <blockquote>
    <p>TypeScript declaration files should never be required</p>
  </blockquote>