title: Parse - Create an AND query of two OR queries
body: <p>I need to do the following query in Parse.com (pseudo language):</p>
  
  <pre><code>select all posts where 
    (expired &lt; today OR expired not exists) 
    AND 
    (owner is {user} OR commenter contains {user})
  </code></pre>
  
  <p>I know in Javascript I can create the two OR queries using <code>Parse.Query.or</code>, but since there doesn't seems to be a <code>Parse.Query.and</code> variant, I don't know how I can combine these two OR queries into a single query.</p>
  
  <p>Other people have suggested to simply use <code>equalTo</code> multiple times to create AND statements, but this doesn't work for a composed OR query.</p>