Fixes #18, checks for missing title when getting page history.

lib/Scripto/Document.php

@@ -804,6 +804,12 @@ protected function _getPageHistory($title, $limit = 10, $startRevisionId = null)
                       'rvprop'    => 'ids|flags|timestamp|user|comment|size')
             );
             $page = current($response['query']['pages']);
+
+            // Return if the page has not been created.
+            if (array_key_exists('missing', $page)) {
+                return $revisions;
+            }
+
             foreach ($page['revisions'] as $revision) {
 
                 $actionPattern = '/^(' . implode('|', $actions) . ').+$/';