LMS-2892

Currently the code in ```tabs-aggregator.coffee``` uses the display name of a tab as the key to index the current tab. When a non-english translation is applied, the javascript code will get localized names instead of the original english names, which causes the following ```getValue``` function fails as it cannot reference the correct tab.
Use the 'data' attribute to store the original tab name.

Refactor get_parent_locations STUD-1663

STUD-302, STUD-303

FOR-578

skip tests if not run in lms

STUD-1658

STUD-1658

There is an option to:
* Enable/disable accordion navigation
* Enable/disable/repoint tab navigation

This allows for full-screen XBlocks (e.g. a code IDE, or large video
player). It is also the first pass at allowing top-level XBlocks. It's
also now possible to make a chromeless XBlock, point a tab to it, and
make it point back to that tab.

Next steps down that path would be:
* Fix up how tabs are handled. The current version is a hack.
* Create appropriate XBlocks for courseware, tabbed navigation,
  etc. to reach feature parity
* Invert/rejigger the XML format.

- Also fixed edit bug when annotation is not created first
- Also fixed indentation issues

JIRA: FOR-627

fix other various i18n issues

STUD-1654

[LMS-2757]

STUD-1792

Currently it is covering the whole parent div.

LMS-2852

FOR-545