增加新京报订阅及其与3DM的说明文档 (#297)

* Add 3dm news center.

* Modify router name, fix timezone issue.

* Add entries in Readme.
Add 新京报

router.js

@@ -302,4 +302,7 @@ router.get('/shmtu/events', require('./routes/shmtu/events'));
 router.get('/shmtu/notes', require('./routes/shmtu/notes'));
 router.get('/shmtu/jwc/:type', require('./routes/shmtu/jwc'));
 
+// 新京报
+router.get('/bjnews/:cat', require('./routes/bjnews/news'));
+
 module.exports = router;