title: Ignore "cannot find module" error on typescript
body: <p>Can the Typescript compiler ignore the <code>cannot find module 'x'</code> error on import expressions such as:</p>
  
  <pre><code>//How to tell the compiler that this module does exists
  import sql = require('sql');
  </code></pre>
  
  <p>There are multiple npm libraries such as <a href="https://github.com/brianc/node-sql">node sql</a> that doesn't have existing typings</p>
  
  <p>Is there a way to tell the compiler to ignore this error other than creating a new definition file with the <code>declare module x ...</code> ?</p>