(WIP) Proctoring: fix sass and use updated edx-proctoring version

SOL-1346:convert string to bytestring before passing it to urllib.quote_plus

Fixes invalid/improper microdata and attribute values in the header logo

Fix stale RTD links in CONTRIBUTING.rst OPEN-1047

TNL-2646: Escape json in Studio

Course pacing template changes.

Make escaping for json simpler and more consistent in Mako templates
- add escape_json_dumps to escape and json.dumps
- add escape_js_str to escape javascript string
- refactor Studio to use escape_json_dumps in Mako templates

TNL-2646: Escape json.dumps

Removing this particular call to json.dumps was done by removing
the complete method subsection_handler which is no longer
used.  The template edit_subsection.html had already been removed.

TNL-2646 Escape json

Release 4 November 2015 to master

Fix underscore extraction error

Update `cert_info` docstring with correct return type.

Disabled auto enroll in ccx coach's enrollment tab

Fixing cert_status None bug

Fix `withData` and `withConfiguration` helpers.

Where possible, use ugettext_noop instead of lambdas assigned to the underscore

Instructor-led is changed to instructor-paced. Adds a label to the
course outline page to show the course pacing.

ECOM-2794
ECOM-2800

If NO_PREREQ_INSTALL is set, print a message to explain why

Replaces instances of an old hack with the more clear ugettext_noop.

Use 0.3.2 of edx-lint, with pylint-django and C extensions read

ngettext and its parameters should not be separated into multiple lines.

further improvement in handling of unicode data

Adam/disable check button on save click

Release 3 November 2015

Fix formatting.

Improve documentation for bok-choy.

Includes info about the serversonly/testsonly pattern, as well
as multiprocessing.

SEC-27: Escape json for Studio advanced settings