Merge branch 'master' into sprint-1-winter-2019

.circleci/config.yml

opentech/apply/activity/messaging.py

opentech/apply/activity/tests/test_messaging.py

...ch/apply/funds/migrations/0048_add_field_slack_channel.py

opentech/apply/funds/models/applications.py

opentech/apply/funds/templates/funds/application_base.html

...y/funds/templates/funds/applicationsubmission_detail.html

...tech/apply/users/migrations/0008_add_staff_permissions.py

opentech/settings/dev.py

...tech/static_src/src/javascript/apply/mailgun-validator.js

opentech/static_src/src/sass/print.scss