title: Adding declarations file manually (TypeScript)
body: <p>I didn't find a declaration file for 'google-spreadsheet' so I'm trying to create one by myself:</p>
  
  <p>in typings -> modules, I've added a new folder named "google-spreadsheet", and there I've added a new file named "index.d.ts" which has the following content:</p>
  
  <pre><code>export class GoogleSpreadsheet {
  
  }
  </code></pre>
  
  <p>In the client file I have this:</p>
  
  <pre><code>import * as GoogleSpreadsheet from 'google-spreadsheet';
  </code></pre>
  
  <p>But 'google-spreadsheet' is marked with red, saying: </p>
  
  <blockquote>
    <p>TS2307 Cannot find module 'google-spreadsheet'.</p>
  </blockquote>
  
  <p>BTW I've NPM-installed 'google-spreadsheet' and it works JavaScriptly. Only the TypeScript bothers me here.</p>
  
  <p>Any ideas how to solve that?</p>