title: How to delete '#' sign in angular-ui-router URLs
body: <p>I'm using the angular-ui-router library and I have a problem with URLs.</p>
  
  <p>I have the following code:</p>
  
  <p>app.js:</p>
  
  <pre><code>app.config(function ($stateProvider, $urlRouterProvider) {
  $stateProvider
      .state('state', {
          url: '/state',
          templateUrl: 'templates/state.html',
          onEnter: function () {
              /*... code ...*/
          }
      })});
  </code></pre>
  
  <p>index.html:</p>
  
  <pre><code>&lt;a href="#/state"&gt;STATE&lt;/a&gt;
  </code></pre>
  
  <p>This works, but when I remove '#' from the <code>&lt;a&gt;</code> tag this doesn't work.</p>
  
  <p>How can I delete the '#' sign from the URL?</p>