title: Create a range of dates
body: <p>I want to create a array of range which contains days betweens a specific start and end date. </p>
  
  <p>For example, I have a start date with 1 January 2012 and and an end date with 7 January 2012. The array or range should contain a collection of NSDate objects (7 in total).</p>
  
  <p>How do I do this?</p>