* add lang itme for files of story and task module.

module/task/lang/en.php

@@ -87,6 +87,7 @@ $lang->task->recordEstimate    = 'Hours';
 $lang->task->editEstimate      = 'Edit Hour';
 $lang->task->deleteEstimate    = 'Delete Hour';
 $lang->task->colorTag          = 'Color tag';
+$lang->task->files             = 'Files';
 
 $lang->task->ditto         = 'Ditto';
 $lang->task->dittoNotice   = "Current task and task above it do not belong to same project!";

module/task/lang/zh-cn.php

@@ -87,6 +87,7 @@ $lang->task->recordEstimate    = '工时';
 $lang->task->editEstimate      = '编辑工时';
 $lang->task->deleteEstimate    = '删除工时';
 $lang->task->colorTag          = '颜色标签';
+$lang->task->files             = '附件';
 
 $lang->task->ditto         = '同上';
 $lang->task->dittoNotice   = "该任务与上一任务不属于同一项目！";