TNL-4214/TNL-4287: Enhance safe template linter

- Check includes for Mako templates
- Check display_name_with_default_escaped uses
- Add exceptions for Underscore and <%=
- Skip templates that are Django and not Mako
- Add pragma to disable errors
- Enhance unit tests
- Remove violation mako-js-string-missing-quotes
- Refactor line processing into StringLines

followup to MA-2164, cleaning up unused steps

Add static HtmlUtils/StringUtils into edx namespace

PR-154 - Make it impossible to click "final check" without selecting a choice

Release

Added safety to lms/templates/student_account/account_settings.html

This is a temporary workaround for code that needs
access to these classes from the UI Toolkit but
without using RequireJS.

mattdrayer/theme-ecommerce-url: Theme support for ECOMMERCE_PUBLIC_URL_ROOT

Clean up escaping in course discovery templates.

Release Candidate rc/2016-03-29

 DOC-2216: Modify message text when Adv Settings saved

DOC-2533: Update help text on Assignment Types page

Activate LMS Navigation Button across sections

Update Bok Choy to 0.5.1 release.

MA-2190

MA-2152
MA-2153

XSS Safe templates

Make (some) Mako templates HTML escaped by default

Reduce the number of queries to mongodb in /courses/<course-id>/instructor/api/gradebook API

Delete out-of-date test.

Add option to bypass course home

Added random seed to metadata that is sent to external grader

Updated dashboard with providers text

ECOM-2935

Merge pull request #11787 from mitocw/enhancement/aq/add_master_course_staff_in_ccx_fix_migration_issue

Adds staff and instructor users of the master course to CCX

Exposes an advanced setting in Studio allowing course teams to bypass the home tab when students arrive from the dashboard, sending them directly to course content. ECOM-3961.

Perform escaping in the templates.