Change save_item and create_item to be RESTful.

hidden-module-unicode: Return unicode string to pass assertion

Studio: Resolves Notifications UI showing in IE9 + CSS Split

Sarina/persist student answers on error

Part of STUD-847.

Fix for advanced settings failure

Conflicts:
	cms/djangoapps/contentstore/views/item.py

Oleg/fix rearrange bug in problems

XBlock Fragments expect unicode strings, and fail on an assertion when
it isn't:

```
2013-11-14 07:55:50,774 ERROR 3788 [django.request] base.py:215 - Internal Server Error: /courses/TestU/TST101/now/courseware/41d55c576a574fde99319420228f7f88/5fef5794e34842f4a2d45ebcdeaa9a3a/
Traceback (most recent call last):
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 111, in get_response
    response = callback(request, *callback_args, **callback_kwargs)
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/contrib/auth/decorators.py", line 20, in _wrapped_view
    return view_func(request, *args, **kwargs)
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/utils/decorators.py", line 91, in _wrapped_view
    response = view_func(request, *args, **kwargs)
  File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/django/views/decorators/cache.py", line 75, in _cache_controlled
    response = viewfunc(request, *args, **kw)
  File "/edx/app/edxapp/edx-platform/lms/djangoapps/courseware/views.py", line 407, in index
    context['fragment'] = section_module.render('student_view')
  File "/edx/app/edxapp/venvs/edxapp/src/xblock/xblock/core.py", line 156, in render
    return self.runtime.render(self, view, context)
  File "/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/x_module.py", line 903, in render
    return block.xmodule_runtime.render(to_render, view_name, context)
  File "/edx/app/edxapp/venvs/edxapp/src/xblock/xblock/runtime.py", line 356, in render
    frag = view_fn(context)
  File "/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/seq_module.py", line 77, in student_view
    rendered_child = child.render('student_view', context)
  File "/edx/app/edxapp/venvs/edxapp/src/xblock/xblock/core.py", line 156, in render
    return self.runtime.render(self, view, context)
  File "/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/x_module.py", line 903, in render
    return block.xmodule_runtime.render(to_render, view_name, context)
  File "/edx/app/edxapp/venvs/edxapp/src/xblock/xblock/runtime.py", line 356, in render
    frag = view_fn(context)
  File "/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/vertical_module.py", line 27, in student_view
    rendered_child = child.render('student_view', context)
  File "/edx/app/edxapp/venvs/edxapp/src/xblock/xblock/core.py", line 156, in render
    return self.runtime.render(self, view, context)
  File "/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/x_module.py", line 903, in render
    return block.xmodule_runtime.render(to_render, view_name, context)
  File "/edx/app/edxapp/venvs/edxapp/src/xblock/xblock/runtime.py", line 356, in render
    frag = view_fn(context)
  File "/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/x_module.py", line 464, in student_view
    return Fragment(self.get_html())
  File "/edx/app/edxapp/venvs/edxapp/src/xblock/xblock/fragment.py", line 34, in __init__
    self.add_content(content)
  File "/edx/app/edxapp/venvs/edxapp/src/xblock/xblock/fragment.py", line 71, in add_content
    assert isinstance(content, unicode)
AssertionError
```

Revert "more granular transactions in grading [LMS-1480]"

This reverts commit 19dd49f3.

Disabled test making external calls to YouTube

Fix misspelled word in test name

Removed old release script

Added explicit wait for payment page to load

Improve memory profile during course grading runs

Revert "Don't allow users to enter video url's in http."

Three more A11Y fixes (medium priority ones).

LMS-469

Adam/more granular grading transactions

restful course_info access

This centralizes the logic for group membership, and means that we
don't need to make queries to find out whether the legacy groups names exist.

- Make email field in forgot password modal aria-required = true
- Added Transcript skip links to both before and after the transcript
- Add language code to main.html so that screenreaders know what language/region to speak for

html page and update access use 2 different urls
GET update can get an individual update
STUD-944

remove field_data_cache from grades.grade and grades.progress_summary

cleans grading code by adding wrappers

Silence noisy loggers in the devstack

Certificates Dashboard Updates

Added wait for JS before clicking nav menus

Disabled LaTeX acceptance test