title: Remove the Standard callout from MapView
body: <p>I need to remove the Standard Callout from the mapview and want to display my custom callout. My custom Callout is having image and many fields. I am designing my custom callout in interface builder. 
  How I can display my custom callout ?</p>
  
  <p>I have referred to the link "Custom callout Bubble", But I want to display the custom callout from xib.</p>