HOTFIX Release for Jan 12, 2016

HOTFIX 2016-01-12

Mark sequence link-color scss variable default.

WIP wiki support for microsite templates

Release for Jan 12, 2016

Disable Optimizely in the courseware view.

Stripping the leading / for the django_templates finder

Enabling the microsite configurations before running django.setup()

Adding only the templates directory before startup

Adding the missing overrides file at the django templates main

Using the comp_theming way of overriding css

Adding test for the microsite_template_path filter

Added tests & general message to js when parsing fails.

TNL-3989

Release Candidate rc/2016-01-12

Enable MathJax in Course Pages

Merge pull request #11125 from mitocw/ehnancement/aq/dont_allow_user_to_register_ccx_without_invitation

Hide CCX course registration from unenrolled students

Disable button while adding/removing bookmark to a unit.

Fixed test quality button works correctly in Video tests failing on C…

TNL-3968

@Revert 10648 edraak/calculator fixups

TNL-4004

Prevent course image thumbnail race condition from causing TransactionManagementError

It somehow ended up in CourseOverviewImageSetTestCase (merge artifact?).

Without this change, we'd throw a TransactionManagementError in the case
where we have a race condition and generate multiple CourseOverviewImageSets
for the same CourseOverview concurrently.

There's already a global $link-color variable defined in
lms/static/sass/base/_variables.scss. Mark the $link-color
variable in sequence scss file with !default, so that the
global $link-color variable gets used, if defined.

Add the migrations necessary for asset base URL support.

userstanding is now OneToOneField

Shrink images

HOL-18 Register form microsite override

Update translations (autogenerated message)

Revert "Add options trailing slashes to the Enrollment API."

Remove unused header_extra.html file

This reverts commit 3149aaa3.

WL-269 used gettext(...) in .underscores files.

Allowed CCX coaches to see individual students progress from grade book