title: Best way to include specific css/js files with ui-router
body: <p>I'm looking for the best way to manage the includes of css files,</p>
  
  <p>I've found a great answer : <a href="https://stackoverflow.com/a/20404559/3163545">https://stackoverflow.com/a/20404559/3163545</a>
  But this is working only with rootProvider.</p>
  
  <p>So how to do something like this with stateProvider :</p>
  
  <pre><code>app.config(['$routeProvider', function($routeProvider){
      $routeProvider
          .when('/some/route/1', {
              templateUrl: 'partials/partial1.html', 
              controller: 'Partial1Ctrl',
              css: 'css/partial1.css'
          })
          .when('/some/route/2', {
              templateUrl: 'partials/partial2.html',
              controller: 'Partial2Ctrl'
          })
          .when('/some/route/3', {
              templateUrl: 'partials/partial3.html',
              controller: 'Partial3Ctrl',
              css: ['css/partial3_1.css','css/partial3_2.css']
          })
  }]);
  </code></pre>
  
  <p>Thank you very much :)</p>