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Adds action link control for default templates
Feature:
* ``ModelViewGroup.action_links`` - define which actions should be linked to in the
default templates. Can be ignored if using custom templates.
* ``AnnotatedObject.action_links`` - returns a list of ``(label, url)`` tuples for
``action_links`` which link to object views
* FastView template contexts have ``action_links`` - a list of ``(label, url)`` tuples
for linking to basic (non-object) views
Internal:
* ``ModelViewGroup`` has ``get_object_views()`` and ``get_basic_views()`` to split the
list of views based on the ``FastViewMixin.has_id_slug`` flag