title: angular.min.js.map not found, what is it exactly?
body: <p>When I load the page and check chrome console i find these errors:
  <img src="https://i.stack.imgur.com/U3lBw.png" alt="enter image description here"></p>
  
  <p>what exactly are map files in angular? </p>
  
  <p>I did reference the angular.min.js but not the angular.min.js.map.
  I am using the angular 1.2 rc release by the way and I just started seeing these errors when i switched to this release.</p>
  
  <pre><code>ERRORS:
  GET http://localhost:44786/Scripts/angular-route.min.js.map 404 (Not Found)       :44786/Scripts/angular-route.min.js.map:1
  GET http://localhost:44786/Scripts/angular-animate.min.js.map 404 (Not Found) :44786/Scripts/angular-animate.min.js.map:1
  GET http://localhost:44786/Scripts/angular-resource.min.js.map 404 (Not Found) :44786/Scripts/angular-resource.min.js.map:1
  GET http://localhost:44786/Scripts/angular.min.js.map 404 (Not Found) :44786/Scripts/angular.min.js.map:1
  </code></pre>