title: Using tornado.httpclient.AsyncHTTPClient.fetch() to make a GET request along with parameters
body: <p>As mentioned in the title, i want to make a asynchronous GET request using the fetch() method of AsyncHTTPclient.</p>
  
  <p>But, I can't figure out where to give the query parameters.</p>
  
  <p>So, say I want to make the request</p>
  
  <p><code>http://xyz.com?a=1&amp;b=2</code></p>
  
  <p>where do I give the <code>a</code> and <code>b</code>? Is the only way to do this is by appending the parameters to the URL. Specifically, is there a way to pass a Dict which then gets appended to the URL by the Tornado framework.</p>