Conflicts:
	cms/djangoapps/contentstore/views/course.py
	common/lib/xmodule/xmodule/tests/test_combined_open_ended.py
	lms/envs/common.py

A one-click way of getting to editing the course

STUD-669.

Includes Data + Schema migrations for optout email -> user.id change.
Note that migrations should be reversible.

Adds a new Email link to the instructor dashboard for frontend interface to send
email to course members. Adds a feature flag ENABLE_INSTRUCTOR_EMAIL to toggle this.
Creates a new djangoapp bulk_email that handles this action by getting the recipient
list and batching the emails to different celery tasks to do the actual sending.
Requires lynx package to convert HTML email to plaintext. Handles SMTP errors by
retrying or falling through to the next email. Adds the option to opt out of course
specific emails in the user dashboard with an Email Settings link for each course.
Uses severable configurable settings with defaults. DEFAULT_BULK_FROM_EMAIL
specifies the from address for email. EMAILS_PER_TASK specifies the number of emails
each celery task takes on. EMAIL_HOST, EMAIL_PORT, EMAIL_HOST_USER,
EMAIL_HOST_PASSWORD, and EMAIL_USE_TLS for the SMTP email backend settings.

Co-authored-by: Akshay Jagadeesh <akjags@gmail.com>

* Make currency a property of the Order (for validation purposes)
* Remove null=True from Char fields
* Use InheritanceManager for subclassing OrderItem
* Change VerifiedCertificate to better handle some new use cases
* Cleaned out old migrations
* Tests!

when in a dev environment.

CMS tests should now run on IE

CMS tests will now run on Safari

Rebased wrong

Forgot to update the test_acceptance.sh

Changed way of string splitting

Configurations must be defined before hand

Reduced pylint violations

We only support 4 browsers

Version numbers have very different ranges for different browsers so not having a dictionary of those.

Fixed a whitespace issue

Fixed pylint/pep8 violations

Don't need django_url

Spacing issues

Changed how commenting works

Forgot one

Used wrong name

Changed around importing

Remove django_url

Fixed function orderingn

Made logic nicer for getting a new browser

Modifying tests to run in opera

Needed to increase time to account for slow sauce loading

Now safari LMS works

Forgot an assert statement

Skipping a few tests for opera

Forgot an import