The travis target should install the test requirements as well as the…

Moving to running analytics tests on 16.04

This commit also switches us from coveralls to codecov.

Updated field names in course summaries.

* renamed start/end_time to start/end_date
* renamed modes to enrollment_modes

Change edx-django-release-util version.

Adds the course metadata enrollment summary endpoint.

* Refactored tests to use a variety of course IDs using ddt
* Bump versions of opaque keys and ccx libraries
* Added timeout check to see if the elasticsearch index is ready in tests (fixes flaky tests)

AN-7880 Uncomment including "posted_forum" events

Change edx-django-release-util version.

Use date instead of datetime in ModuleEngagementMetricRanges.

Change edx-django-release-util version.

Adds CSV support to the LearnerListView

* Puts pagination previous/next links in the HTTP header
* Allows the returned field list (for CSV only) to be limited by the
  'fields' query string parameter.
* Flattens CSV list fields into a comma-delimited string, instead of showing list.0,list.1..
* Upgrades djangorestframework-csv to maintain fields/heading sort order in CSV.
* Avoids duplicate-code warnings by moving the CSV response validation tests to
  a new analytics_data_api.v0.tests.views.VerifyCsvResponseMixin

Adds endpoint to download course reports

Added 10 new userprofile fields to RosterEntry

and its corresponding LearnerSerializer, and tests.

Fix: add "--run-syncdb" to the migrate Make rule

Upgrade to Django 1.9