Implemented import shortcuts, closes #957

docs/internals.rst

@@ -935,3 +935,18 @@ This example uses the :ref:`register_routes() <plugin_register_routes>` plugin h
 
 
 Adding ``?_trace=1`` will show that the trace covers both of those child tasks.
+
+.. _internals_shortcuts:
+
+Import shortcuts
+================
+
+The following commonly used symbols can be imported directly from the ``datasette`` module:
+
+.. code-block:: python
+
+    from datasette import Response
+    from datasette import Forbidden
+    from datasette import NotFound
+    from datasette import hookimpl
+    from datasette import actor_matches_allow

docs/plugin_hooks.rst

@@ -542,7 +542,7 @@ Return a list of ``(regex, view_function)`` pairs, something like this:
 
 .. code-block:: python
 
-    from datasette.utils.asgi import Response
+    from datasette import Response
     import html
 
 
@@ -582,6 +582,8 @@ The view function can be a regular function or an ``async def`` function, depend
 
 The function can either return a :ref:`internals_response` or it can return nothing and instead respond directly to the request using the ASGI ``send`` function (for advanced uses only).
 
+It can also rase the ``datasette.NotFound`` exception to return a 404 not found error, or the ``datasette.Forbidden`` exception for a 403 forbidden.
+
 See :ref:`writing_plugins_designing_urls` for tips on designing the URL routes used by your plugin.
 
 Examples: `datasette-auth-github <https://datasette.io/plugins/datasette-auth-github>`__, `datasette-psutil <https://datasette.io/plugins/datasette-psutil>`__