Django-templateselector

^^^^^^
* |FIX| Added ``:focus`` visual styles so that keyboard navigation through a form
including the widget may now indicate when selecting items.

^^^^^^
* |NEW| Added a `system check`_ to ensure that the templates and styles are
able to be loaded.

^^^^^^
* |FIX| Change the model level field validation (``TemplateField(match=...)`` to
forcibly check the given value matches the regex, in addition to checking
whether the given value exists in one of the template loaders.
* |META| Still trying to master automatic deployment from Travis. One day I'll
get sdist working again!

^^^^^^
* |META| Still trying to master automatic deployment from Travis. No
functionality change since ``0.2.0``

^^^^^^
* |META| Automatic deployment of new releases from Travis mostly worked, but the
``sdist`` is in poor shape (see commit ``44ad2a1542f2f61a73de84e0f7213bccfdb6f265``)
so I've disabled that for now. Wheels are better anyway, right? No
functionality change since ``0.2.0``

^^^^^^

* |FIX| prevent the "same" template showing up more than once in the
widget, which wouldn't be possible when using ``get_template`` (`1`_)
* |NEW| If the form field (``TemplateChoiceField``) has only **one** valid template
option, and the form is unbound (ie: its an **add** form or whatever) then
pre-select the valid choice. Only happens if the field has ``required=True``
* |NEW| using the ``get_<fieldname>_display`` as a value in a ModelAdmin.list_display``
will now allow for sorting by the underlying value in the database. (`2`_)
* |NEW| if the ``<fieldname>`` is used as part of a ``ModelAdmin.list_filter`` it will
show the nice display names of any used templates, rather than their internal
path representation. (`3`_)