Merge branch 'chart_widget' into staging

deploy/pip_packages.txt

django/website/hid/migrations/0001_initial.py

django/website/hid/static/hid/widgets/chart.js

django/website/hid/templates/hid/tests/chart.html

django/website/hid/templatetags/json_data.py

django/website/hid/tests/chart_javascript_tests.py

django/website/local_settings.py.dev

django/website/settings.py

django/website/urls.py