BLD-1121: Create new group configurations page.
Merge pull request #4290 from edx/anton/create-new-configurations

Create new group configurations page.
Add JQuery timepicker CSS to the unit and container templates
Fix pending name changes template

- Strings marked for translation need to be wrapped in quotes to be
string type.
- Update old post function call
- Remove extra close brackets in function definitions
- Wrap href attribute in quotes
- Move square bracket outside of translated text
Merge pull request #4411 from edx/anton/group-experiments

Create new group configurations page
Update (optional) Group Configuration urls to use settings.COURSE_KEY_PATTERN.
Merge pull request #4423 from edx/tim/group-conf-course-key-pattern

Update (optional) Group Configuration urls to use settings.COURSE_KEY_PATTERN
Merge pull request #4416 from edx/will/timepicker-css-in-unit-editor

Add JQuery timepicker CSS to the unit and container templates
Merge pull request #4420 from Stanford-Online/kluo/fix-name-changes-template

Fix pending name changes template
Fix calls to get_module to not pass course ids as positions
Merge pull request #4414 from cpennington/fix-get-module-calls

Fix calls to get_module to not pass course ids as positions
Replace unit page with the container page.

STUD-1754
New Publishing controls on Unit page.

STUD-1707
cleanup of unit, container, and xblock sass; added modules and layout sass; publishing states and actions on new unit
New publishing controls on unit page (continued)

STUD-1707
Fix whitespace problems in xblock string field editor.

Whitespace is now trimmed from input. If after trimming input is empty
(pure whitespace or the empty string), the field is not updated.
Adds warning when editing a container visible to students

styling for editing a live unit
Updates based on merge with master.
Displays the date, time, and username of the most recent save and publish

Conflicts:
	cms/djangoapps/contentstore/views/item.py
Removes unnecessary PUT after DELETE