Reorganize folder structure for documentation
Merge pull request #350 from edx/sylvia/docs/DOC-416

Sylvia/docs/doc 416
Remove deprecated Exception.message calls; fix TIM-497
Fix a 500 error caused by retrieving peer workflow after an integrity error when using repeatable-read
Merge pull request #355 from edx/will/TIM-585

Bugfix: TIM-585
Revert "Show new-style locations in course staff debug info (opaque keys update)"

This reverts commit 24df7773beffa932b04a66345a764a0f2ac34c2c.
Merge pull request #356 from edx/will/use-old-course-locations-for-staff-info

Back to old-style locations for course staff info
Merge pull request #354 from edx/will/error-msg-fixups

Remove deprecated Exception.message calls; fix TIM-497
Merge remote-tracking branch 'origin/master' into ai-grading

Conflicts:
	apps/openassessment/xblock/staff_info_mixin.py