title: How do I go about upgrading jQuery in my project?
body: <p>I'm trying to work out the best way to upgrade jQuery.</p>
  
  <p>Let's say I am using jQuery v1.4.4, and I want to upgrade to 1.7.1. </p>
  
  <p>If I want to update, should I remove <code>jquery-1.4.4.js</code> completely from my project or should I keep <code>jquery-1.4.4.js</code> in addition to <code>jquery-1.7.1.js</code>? </p>
  
  <p>Also there may be some jQuery files that may be referencing <code>jquery-1.4.4.js</code>, What is the best way of upgrading these cases? </p>