title: ngCordova getUUID() returns device is undefined
body: <h2>ngCordova getUUID() returns device is undefined</h2>
  <p>I am using Ionic framework to build a mobile app , i need to retrieve the device UUID
  i used ngCordova using the minified version from here
  <a href="http://ngcordova.com/docs/" rel="nofollow noreferrer">ngCordova</a>!</p>
  <p>here is my main module</p>
  <pre><code>angular.module('starter', ['ionic','ngCordova'])
  .controller('test',function($scope,$cordovaDevice){
  $scope.uuid=$cordovaDevice.getUUID();
  console.log($cordovaDevice)
  })
  </code></pre>
  <p>$cordovaDevice is defined as object when using console.log but when using $cordovaDevice.getUUID() it gives me 'device is not defined'  any help with that</p>