[ADD] support for fetching views's fields straight from demo

* resolves action by external id
* fetches relevant view
* prints table of all fields with an @help in view order

conf.py

@@ -32,6 +32,7 @@ extensions = [
     'sphinx.ext.todo',
     'odoo',
     'html_domain',
+    'demo_link',
 ]
 
 # Add any paths that contain templates here, relative to this directory.