[bug]   -watch 的健壮问题，基本用不了

1. 父模板在 _layouts 目录下的情况
```
2020/02/17 10:35:57 CreateFile F:\workspace-go\api-server\app\views\front\_layouts\base.html___jb_old___: The system cannot find the file specified
```

2.父模板目录名很正常的情况
```
2020/02/17 10:38:15 dependency F:\workspace-go\api-server\app\views\front\index.html not parsed
```