Fixes extra 'file' that was leftover locally after import

Adam/welcome email

Remove dogstatsd-python in favor of dogapi

fix templates

Change course id limit to 65.

Updating LTI Jasmine tests.

Due to the fact that by default the LTI settings have "http://www.example.com"
set as the default form action (launch_url), tests were updated to reflect the
fact that when setting is in default state, form is not submited, even when
the form action is not empty.

Also added datadog application to commom django apps and set it to use
a local statsd server by default.

STUD-726

Update `requests` library to 1.2.3

Improve forums nav accessibility

Add logging to save item

Add event tracking with configurable backends

Adding styles to fix issue BLD-221.

If you make the window smaller, and keep reducing it's size, at some
point the controls will not fit, and some will be bumped to the next row.
When the widnow is resized below the width 1024, extra styling rules
will kick in to fix this issue. The word "Speed" from the speeds control
will be temporarirly hidden.

Add mitxmako.middleware to fix workers

Revamped + Enhanced Shibboleth support

Necessary for RFC compliance with oauthlib

The home icon and discussion topic drop-down icon now have text that is
visible only to screen readers. The visual change between the icon and the
topic name with down-arrow is now achieved with the CSS visible property
instead of the opacity property, so only one at a time will be visible to
screen readers as well as visually.

Fix element name conflict

Translate …

LTI module with tests

LTI blade allows to include LTI components to courses.
Python integration, Jasmine and acceptance tests are included.

Revert "Merge pull request #804 from edx/valera/lti_module"

This reverts commit 2894b21c, reversing
changes made to 34d0fe15.