title: authentication fail in laravel and sentry package
body: <p>im trying to use Sentry 2 in my new application to handle all users and groups .<br />
  after authenticate user with sentry and when trying to redirect to another page the authentication lost <br />
  in the test code the output of the check function <code>Sentry::check()</code> is true</p>
  
  <pre><code>public function Login(){
                 $credentials = array(
                          'username'    =&gt; 'Mouad',
                          'password' =&gt; 'test',
                      );
  
                  // Authenticate the user
                 $user = Sentry::authenticate($credentials, false);
                 var_dump(Sentry::check());
  
  
      }
  </code></pre>
  
  <p>session output</p>
  
  <pre><code>array (size=3)
    '_token' =&gt; string 'slAqB8IYYrSPPSC1k1A2i8aTpkpVklPad3fiqoFA' (length=40)
    'flash' =&gt; 
      array (size=2)
        'old' =&gt; 
          array (size=0)
            empty
        'new' =&gt; 
          array (size=0)
            empty
    'cartalyst_sentry' =&gt; 
      array (size=2)
        0 =&gt; null
        1 =&gt; string '$2y$08$nWq4rHlacrNykXhQykipJ.0c8mr6VK4o364UvatPtJZ1kM1W8KH7K' (length=60)
  </code></pre>
  
  <p>when i tried to redirect the page after authentication the 'cartalyst_sentry' session entry changed and output of the check function <code>Sentry::check()</code> is false</p>
  
  <pre><code> public function Login(){
                 $credentials = array(
                          'username'    =&gt; 'Mouad',
                          'password' =&gt; 'test',
                      );
  
                  // Authenticate the user
                 $user = Sentry::authenticate($credentials, false);
                 return Redirect::to('admin');
  
  
      }
      public function Admin(){
          $data = Session::all();
          var_dump($data);
          var_dump(Sentry::check());
      }
  </code></pre>
  
  <p>the route configuration is simple</p>
  
  <pre><code>Route::get('/', 'MainController@Index');
  Route::get('create', 'MainController@Create');
  Route::get('login', 'MainController@Login');
  Route::get('admin', 'MainController@Admin');
  Route::get('logout', 'MainController@Logout');
  </code></pre>
  
  <p>session configuration is default and Storage folder is writable</p>