#241 Add article_permalink directive to index controller

It appears that the blog filter controller breaks it.  You might want to create a "permalink" controller that handles look up by id.  You could do a route like: /permalink/:type/:id and it just looks in the database and builds a redirect by: 
```
var objFromDb = ...;
pb.UrlService.urlJoin('/', type, objFromDb.url);
```