title: What is the purpose of backbone.js?
body: <p>I tried to understand the utility of backbone.js from its site <a href="http://documentcloud.github.com/backbone" rel="noreferrer">http://documentcloud.github.com/backbone</a>, but I still couldn't figure out much.</p>
  
  <p>Can anybody help me by explaining how it works and how could it be helpful in writing better JavaScript?</p>