Merge pull request #35 from hostnet/master

add target_project_id to create merge request

Author: m4tthumphrey

lib/Gitlab/Api/MergeRequests.php

@@ -17,13 +17,18 @@ public function show($project_id, $mr_id)
         return $this->get('projects/'.urlencode($project_id).'/merge_request/'.urlencode($mr_id));
     }
 
-    public function create($project_id, $source, $target, $title, $assignee = null)
+    public function create($project_id, $source, $target, $title, $assignee = null, $target_project_id = null)
     {
+        if ($target_project_id && ! is_numeric($target_project_id)) {
+            throw new InvalidArgumentException('target_project_id should be numeric, the project name is not allowed');
+        }
+
         return $this->post('projects/'.urlencode($project_id).'/merge_requests', array(
             'source_branch' => $source,
             'target_branch' => $target,
             'title' => $title,
-            'assignee_id' => $assignee
+            'assignee_id' => $assignee,
+            'target_project_id' => $target_project_id
         ));
     }