Django-netjsonconfig

--------------------------

- `29 <https://github.com/openwisp/django-netjsonconfig/issues/29>`_:
[models] Updated sortedm2m ``__str__`` definition
- `bc1910d <https://github.com/openwisp/django-netjsonconfig/commit/bc1910d>`_:
[admin] Do not set initial backend value for existing instances
- `6a24393 <https://github.com/openwisp/django-netjsonconfig/commit/6a24393>`_:
[requirements] netjsonconfig>=0.6.2,<0.7.0

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- `51 <https://github.com/openwisp/django-netjsonconfig/issues/51>`_:
[django] Upgraded to django 1.11
- `59 <https://github.com/openwisp/django-netjsonconfig/issues/59>`_:
[json_editor] Fixed alignment issue
- `5945b70 <https://github.com/openwisp/django-netjsonconfig/commit/5945b70>`_:
[admin] Moved ``submit_line.html`` to `openwisp-utils
<https://github.com/openwisp/openwisp-utils>`_

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- `1bc8304 <https://github.com/openwisp/django-netjsonconfig/commit/1bc8304>`_:
[controller] Collect SOC / CPU field during registration
- `a6847b5 <https://github.com/openwisp/django-netjsonconfig/commit/a6847b5>`_:
[admin] Added ``system`` field in ``DeviceAdmin``
- `0dcc71d <https://github.com/openwisp/django-netjsonconfig/commit/0dcc71d>`_:
[openwisp-utils] Moved shared logic to `openwisp-utils
<https://github.com/openwisp/openwisp-utils>`_

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- `1a28dae <https://github.com/openwisp/django-netjsonconfig/commit/1a28dae>`_:
[requirements] Enable `netjsonconfig 0.6.0

--------------------------

- `48 <https://github.com/openwisp/django-netjsonconfig/issues/48>`_:
[feature] Added template tags
- `52 <https://github.com/openwisp/django-netjsonconfig/issues/52>`_:
[models] Added device model (**backward incompatible change**)
- `55 <https://github.com/openwisp/django-netjsonconfig/issues/55>`_:
[config-editor] Disabled schema validation for VPN

--------------------------

- `49 <https://github.com/openwisp/django-netjsonconfig/issues/49>`_:
[admin] fixed fullscreen covering preview issue, thanks to `gastonche <https://github.com/gastonche>`_
- `47 <https://github.com/openwisp/django-netjsonconfig/issues/47>`_:
[admin] Added templates in config filter