Django-netjsongraph

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- `39 <https://github.com/netjson/django-netjsongraph/pull/39>`_:
Upgraded to django 1.11
- `891e58 <https://github.com/netjson/django-netjsongraph/commit/891e58>`_:
[admin] Moved submit_line.html to openwisp_utils

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- `fefbce5 <https://github.com/netjson/django-netjsongraph/commit/fefbce5>`_:
[visualizer] Provided base classes to improve reusability
- `a0c4cc7 <https://github.com/netjson/django-netjsongraph/commit/a0c4cc7>`_:
Added netjsongraph.js visualization to admin site

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- `24 <https://github.com/netjson/django-netjsongraph/issues/24>`_:
Provided base classes to improve reusability
- `27 <https://github.com/netjson/django-netjsongraph/issues/27>`_:
[link] Added ``link_status_changed`` signal
- `15 <https://github.com/netjson/django-netjsongraph/issues/15>`_:
Added ``NETJSONGRAPH_VISUALIZER_CSS`` setting and instructions to override default templates

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- `17 <https://github.com/netjson/django-netjsongraph/issues/17>`_:
Updated django-rest-framework version requirement
- `22 <https://github.com/netjson/django-netjsongraph/issues/22>`_:
Added support for Django 1.11
- `18 <https://github.com/netjson/django-netjsongraph/issues/18>`_:
[QA] Added flake8 and isort checks to travis-ci build
- `9 <https://github.com/netjson/django-netjsongraph/issues/9>`_:
Added a way to easily copy API endpoint URL when using RECEIVE strategy

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- `16 <https://github.com/netjson/django-netjsongraph/issues/16>`_:
added support for django 1.10.x
- `9ce1b15 <https://github.com/netjson/django-netjsongraph/commit/9ce1b15>`_:
[JS] Updated d3 to 3.5.17

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- `f3fa59f <https://github.com/netjson/django-netjsongraph/commit/f3fa59f>`_:
[admin] fixed name mismatch in "Links to other nodes"
- `10 <https://github.com/netjson/django-netjsongraph/issues/10>`_:
fixed visualizer: removed accidental ignore of d3.js