xmodule_assets doesn't pass edx's django settings when it executes
resulting in an import error for xmodules that access django settings
directly or imports code that does.

Updated ProctorPanel to move all code that needs to read from django
settings into __init__. This includes the import of
django.contrib.auth.models.User which automatically tries to read from
django settings on load.

Refactored for latest edX changes

(cherry picked from commit cc083275)

(cherry picked from commit faefba91)

The IDDE implementation relied on a StudentModule being created for a
particular block in order to set the extended due date on that block.
Since StudentModules seem to be created on demand whenever data is
written to an attribute with Scope.user_state, it meant that if a
homework problem hadn't yet been touched by a student it was possible
that the due date extension wouldn't take effect for that problem, even
if the due date extension was successfully set for the parent unit.

This patch fixes this problem by creating new StudentModules as
necessary in order to make sure extended due dates propogate properly to
all problems in a unit.

(cherry picked from commit 209c15d1518c7a0df8dd44ff8e0a900cd1c9fdc4)

(cherry picked from commit 9949c3d490408aba8a61259439412d273c5c2a95)

fix for modal appearing off-screen

ORA2 release 2014-05-19

Sarina/051914 language update

SymbolicResponse fix error message.

Online help system

Sock template changes

Changed help button to link and removed drop-down items

Use local storage instead of S3 for uploads in devstack.

Added rst version of cognitive load page

disabled test_lms.py:XBlockAcidNoChildTest.test_acid_block

Update Video component to reflect new UI

remove redundent code on course import

Skip language changing tests

STUD-1595