Django-netjsonconfig

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- `e96e262 <https://github.com/openwisp/django-netjsonconfig/commit/e96e262>`_:
allow ``blank=True`` in ``BaseConfig`` (but not Templates)
- `10 <https://github.com/openwisp/django-netjsonconfig/issues/10>`_:
[admin] added configuration preview
- `12 <https://github.com/openwisp/django-netjsonconfig/issues/12>`_:
[admin] added unsaved changes warning
- `11 <https://github.com/openwisp/django-netjsonconfig/issues/11>`_:
[admin] moved preview in ``submit_row``
- `14 <https://github.com/openwisp/django-netjsonconfig/issues/14>`_:
[admin] added "visualize" and "download" links for templates

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- `9 <https://github.com/openwisp/django-netjsonconfig/issues/9>`_ added "visualize" and "download" links for templates
- `7 <https://github.com/openwisp/django-netjsonconfig/issues/7>`_ added ``report-status`` mechanism
- `4905bbb <https://github.com/openwisp/django-netjsonconfig/commit/4905bbb>`_ [config] auto detect hostname unless overridden
- `8 <https://github.com/openwisp/django-netjsonconfig/issues/8>`_ added ``last_ip`` field
- `11 <https://github.com/openwisp/django-netjsonconfig/issues/11>`_ added revision history via django-reversion

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- `2 <https://github.com/openwisp/django-netjsonconfig/issues/2>`_ simplified override of ``Device`` admin ``change_form.html`` template
- `3 <https://github.com/openwisp/django-netjsonconfig/issues/3>`_ added simple http controller
- `5 <https://github.com/openwisp/django-netjsonconfig/issues/5>`_ fixed ``ImportError`` during ``Device`` validation
- `4 <https://github.com/openwisp/django-netjsonconfig/issues/4>`_ renamed ``Device`` to ``Config``
- `6 <https://github.com/openwisp/django-netjsonconfig/issues/6>`_ added more structure to HTTP responses of controller

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- fixed files in pypi build

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- `99244a0 <https://github.com/openwisp/django-netjsonconfig/commit/99244a0>`_ added ``key`` field to Device
- `46c1582 <https://github.com/openwisp/django-netjsonconfig/commit/46c1582>`_ added ``key_validator`` to validate ``key`` field
- `3016a2e <https://github.com/openwisp/django-netjsonconfig/commit/3016a2e>`_ admin: improved style of config textarea
- `ec1544a <https://github.com/openwisp/django-netjsonconfig/commit/ec1544a>`_ admin: improved overall usability
- `1 <https://github.com/openwisp/django-netjsonconfig/issues/1>`_ fixed admin ``clean_templates`` for new devices

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* manage devices
* manage templates
* multiple template inheritance with django-sortedm2m
* download configurations
* visualize configuration