title: Ionic 2: Register custom typings file in RC.0
body: <p>In beta11 I put my own customTypings.d.ts in the typings folder.<br>
  This folder doesn't exist in Ionic RC.0.</p>
  
  <p><strong>Q) So how do I register my custom typings file now in RC.0?</strong></p>
  
  <p><em>e.g. customTypings.d.ts:</em></p>
  
  <pre><code>interface Window {
      plugins: any;
  }
  
  declare var SignaturePad: {
      new(canvas: any, options?: any): any;
  }
  
  interface CordovaPlugins {
      OneSignal: any;
  }
  </code></pre>