title: Query between two NSDate in coredata
body: <p>I am using <code>Coredata</code> in my application.I want a query from my <code>Message</code> table where <strong>date1-date2 >= 5</strong> mins.<code>date1</code> and <code>date2</code> are <code>NSDate</code> objects. Any help will be appreciable</p>