title: php autoload not loading correctly?
body: <p>Using php-ews I try to create a calendar event by example (just to get the hang of it):</p>
  
  <pre><code>require $server_path.'scripts/ews/vendor/autoload.php';
  use garethp\ews\API;
  use garethp\ews\API\Enumeration;
  use garethp\ews\API\Type;
  
  $ews = API::withUsernameAndPassword($exchange_host, $_SESSION["user_data"]["u_email"], $_SESSION["user_data"]["u_pwd"]);
  </code></pre>
  
  <p>Seems to work without errors.</p>
  
  <pre><code>// Start building the request.
  $calendar = $ews-&gt;getCalendar();
  
  $start = new DateTime('8:00 AM');
  $end = new DateTime('9:00 AM');
  
  $request = array(
      'Items' =&gt; array(
          'CalendarItem' =&gt; array(
              'Start' =&gt; $start-&gt;format('c'),
              'End' =&gt; $end-&gt;format('c'),
              'Body' =&gt; array(
                  'BodyType' =&gt; Enumeration\BodyTypeType::HTML,
                  '_value' =&gt; 'This is &lt;b&gt;the&lt;/b&gt; body'
              ),
              'ItemClass' =&gt; Enumeration\ItemClassType::APPOINTMENT,
              'Sensitivity' =&gt; Enumeration\SensitivityChoicesType::NORMAL,
              'Categories' =&gt; array('Testing', 'php-ews'),
              'Importance' =&gt; Enumeration\ImportanceChoicesType::NORMAL
          )
      ),
      'SendMeetingInvitations' =&gt; Enumeration\CalendarItemCreateOrDeleteOperationType::SEND_TO_NONE
  );
  
  $request = Type::buildFromArray($request);
  $response = $ews-&gt;CreateItem($request);
  </code></pre>
  
  <p>I get:</p>
  
  <p>PHP Fatal error:  Call to undefined method garethp\ews\API::CreateItem() in</p>
  
  <p>in the execute part ($ews->CreateItem())</p>