Update ORA docs for GUI and Top Responses
Merge pull request #573 from edx/sylvia/docs/ORA-65

Sylvia/docs/ora 65
Use caching for leaderboard

Fix loading step CSS location
Merge pull request #616 from edx/will/top-scores-fixups

Will/top scores fixups
i18n pull
Added image display in leaderboard
Sync fork
Update leaderboard test for no text submission
Merge pull request #615 from UQ-UQx/master

Added image display in leaderboard
Update i18n strings
Creation of trackchanges django app

* Submodule is probably the wrong way to go with this, we ultimately
  probably want it to be a separate pip-installable python module, but
  for the moment this is convenient and lets us leverage existing
  infrastructure easily. At least in theory.
* BUG: server doesn't seem to start up? Or have modules available inside
  manage.py that we expect.
* This commit adds skeleton files and the simplest model that could
  possibly work.

adding view that spits out JSON

more work that pipes trackchanges objects to html

add ajax POST and other stuff

xml stuff, makefile and rebase

added trackchanges rubric and started piping ice lib file through

1st try at adding url through XML

WIP: first pass at mixin style handlers

UI Changes

WIP: trying to get javascript using new views

more WIP changes (conversion to mixin done, schema issues present)

WIP: Fixing the South migrations for Trackchanges

Integrating trackchanges into peer assesment

more WIP - fixed UI after mixin conversion. removeing scorer IDs is next

WIP I think I have getting working as well as saving

fix edit saving with new backend

back to functionality of this AM, WOOOOOOO
make peer_assessment track_changes check more robust

add Studio field

test default track changes studio field

more studio setting stuff

more WIP

add stuff to studio mixin and add debug output

changes var names

changes var names

track changes plumbin for studio
Fix failing Python tests for track_changes

There is still one failing Python test, but it also fails on master:
> FAIL: test_file_cache_downloads
> (openassessment.assessment.test.test_ai_models.AIClassifierSetTest)
more changes to try to get studio to work

JS CRAP

WIP devtest canned message

WIP devtest canned message

WIP devtest canned message

WIP devtest canned message

WIP devtest canned message

WIP devtest canned message

WIP devtest canned message

WIP devtest canned message

WIP devtest canned message

marking strange behavior, putting makefile back
Remade javascript
removed unecessary js if, and cleaned up studio_mixin
I'm pretty sure we don't need this any more