Merge branch 'Django_1.11.5_upgrade' into 'master'

gracedb/api.py

gracedb/buildVOEvent.py

gracedb/feeds.py

gracedb/models.py

gracedb/reports.py

gracedb/templatetags/flash.py

gracedb/urls.py

gracedb/urls_rest.py

gracedb/view_logic.py

gracedb/view_utils.py

gracedb/views.py

ligoauth/middleware/auth.py

middleware/accept.py

middleware/cli.py

middleware/performance.py

middleware/profiling.py

settings/base.py

settings/test.py

static/css/style.css

templates/base.html