also add hasUpdated to oc_filesystem and oc_filesystemview

lib/filesystem.php

@@ -474,6 +474,15 @@ class OC_Filesystem{
 	static public function search($query){
 		return OC_FileCache::search($query);
 	}
+
+	/**
+	 * check if a file or folder has been updated since $time
+	 * @param int $time
+	 * @return bool
+	 */
+	static public function hasUpdated($path,$time){
+		return self::$defaultInstance->hasUpdated($path);
+	}
 }
 
 require_once('filecache.php');

lib/filesystemview.php

@@ -444,4 +444,13 @@ class OC_FilesystemView {
 		}
 		return null;
 	}
+
+	/**
+	 * check if a file or folder has been updated since $time
+	 * @param int $time
+	 * @return bool
+	 */
+	public function hasUpdated($path,$time){
+		return $this->basicOperation('hasUpdated',$path,array(),$time);
+	}
 }