title: nspredicate multiple OR conditions
body: <p>I'm trying to fetch RLMObjects based on Type property of the RLMObject.</p>
  
  <p>Here are the few predicate string I tried, some worked and some didn't :</p>
  
  <pre><code> @"location = 'Canada' and Type = 'Call'"                     //works well
  
   @"location = 'Canada' and Type = 'Call' or Type = 'Meeting'" //failed
  
   @"location = 'Canada' and Type = 'Call' or Type = 'Meeting' or Type = 'Reminder'" //failed
  </code></pre>
  
  <p>Why the last two predicate strings failed ?</p>