Detached categories don't access control on date

i19 base capa strings

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

Adding missing forum permissions seeding routine to xml_import

Ned/i18n docs in repo

removes unsure button (ORA-254)

Currently if a course is only imported from the command line the
forum permissions are not seeded, this adds that functionality
Switched to doing seeding outside of xmodule library
Switched to using course_items
Switching to simpler test class

LMS-1744

Revert django-debug-toolbar related updates on master, set version to 0....

expand forums' search text input whenever the field receives focus.

(STUD-1201)

Revert "Specific django-toolbar version (stable released) and update the panels in dev envs"

This reverts commit a465b082.

Revert "Updated settings for devstack django debug toolbar"

This reverts commit 30199e8a.

JIRA: FOR-203

Ned/add i18n for inputtypes

[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]

First pass at Translators guide

LMS-1972

Updated settings for devstack django debug toolbar

Internationalize the forums post Markdown editor

Factor the core Capa problem logic into a mixin.

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.

Reorganize doc for i18n

Django toolbar update

STUD-1090

STUD-1094

This includes removing the "PREVIEW" label for the preview pane from CSS
and adding it to the generated DOM.

Support duplicating an existing xblock to a supplied parent location.