Added some docs for external doc_dir and parsed MethodView.

README.md

@@ -367,6 +367,12 @@ app.run(debug=True)
 
 ```
 
+## Auto-parsing external YAML docs and `MethodView`s
+
+Flasgger can be configured to auto-parse external YAM API docs.  [Set a `doc_dir`](https://github.com/rochacbruno/flasgger/blob/aaef05c17cc559d01b7436211093463642eb6ae2/examples/parsed_view_func.py#L16) in your `app.config['SWAGGER']` and Swagger will load API docs by looking in `doc_dir` for YAML files stored by endpoint-name and method-name.  For example, `'doc_dir': './examples/docs/'` and a file `./examples/docs/items/get.yml` will provide a Swagger doc for `ItemsView` method `get`.
+
+Additionally, when using **Flask RESTful** per above, by passing `parse=True` when constructing `Swagger`, Flasgger will use  `flask_restful.reqparse.RequestParser`, locate all `MethodView`s and parsed and validated data will be stored in `flask.request.parsed_data`.
+
 ## Handling multiple http methods and routes for a single function
 
 You can separate specifications by endpoint or methods