LMS-1747

We use Pillow now, which can be installed via PyPI

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.

BLD-529.

BLD-529.

BLD-529.

Before this, the VCR showed total time as 00:00:00 for YouTube
videos just after page loaded. The correct total time is shown only
after the user clicks Play button.

BLD-529.

Tests LMS-2073 (non-ascii course image names) and STUD-1197 (spaces in
course image names)

Also pep8, pylint, and style fixes
Covers:
{capa_problem, correctmap, customerender,
inputtypes, responsetypes, util, xqueue_interface}.py
LMS-1744

LMS-1744

[LMS-1597]

[LMS-1597]

LoncapaProblem was using ModuleSystem directly, but we're about to need
i18n passed in, so this gives LoncapaProblem its own LoncapaSystem
object to better module its dependencies.  This commit simply passes
through the attributes of ModuleSystem that Loncapa needs.

[LMS-1597]

This mixin can be used by either the current XModule, or by an XBlock. Leave
the XModule-specific code in capa_module and move the shared code to capa_base.
Plan to move caba_base into the capa package in the future.

And while I was in there, I made it a decorator, so it's nicer to use.

So that About pages will display in the LMS if the user is not logged in

ORA-195

Set default tolerance to 1e-3% for all responsetypes.

STUD-872

XModules continue to use their own interface for xml, but provide an
adaptor that makes the the XBlock interface available.

[LMS-179]