Make video debug messages consistent.

Add tests of compiled translated strings, so that we can check them into the repo safely.

Make problem types pluggable.

Fix video progress slider method.

Fix video code duplication.

rangeParams returned from getRangeParams() function is already
an object that contains the left and width properties. It can
be passed directly to the jQuery css() function.

In each Video JavaScript module, methods are either private,
or public. When a method is public, it is made available via
the state variable. It seems that a while ago one method
was made public, but throughout the code it is used as a private
method. This has been corrected.

In the JavaScript console all messages from the Video
player should begin with "[Video info]: ". This way it
is easier to see which console.log() messages are from
the Video player, and which console.log() messages are
temporary, and should be removed before a merge/commit.

This patch adds the ability for arbitrary packages to register
themselves with xmodule.x_module.ResourceTemplates as being providers of
boiler plate templates used for defining the types of problems
instructors can add to a course.  This allows third party add-ons to
define new problem types that can then be available to instructors to
use.

This patch is the result of discussion with Ned Batchelder on the right
way to approach this problem.  The solution provided here is,
admittedly, a little bit of a hack.  But the focus was on making a least
invasive fix to make something work, in anticipation that when problems
get moved into the newere XBlock architecture something a little nicer
will be in place.

Create mapping for previously unmapped locations in order to get

Implement a course outline REST API

Correct exception raising bug for non global staff accessing missing course git logs

Front-end work for duplicating components on the unit page.

Add additional logging for importing course from git

Allows students to download the transcript of the video without timecodes

Add a setup.py so we can import top-level directories.

Make test_validate into separate command-line script (i18n)

LMS-1963

STUD-1192

i18n: extract strings from underscore templates

JIRA: FOR-400

Fix forum buttons

Fix non-ascii course image names

STUD-1186

Remove authority name from url.

Upgrade mako

Valera/fix start time end time 2