Update opaque_keys docs
Update get_discussion_link command to use CourseKeys
Ensure all cms commands accept either deprecated or new syntax for keys
LMS-2712
Merge pull request #3750 from edx/dhm/opaque-delete-course

Ensure all cms commands accept either deprecated or new syntax for keys
Merge pull request #3753 from edx/diana/update-forums-cmd

Update get_discussion_link command to use CourseKeys
Merge pull request #3746 from cpennington/opaque-keys-docs-link

Update opaque_keys docs
Fix doc typos from #3746
Fix issues with psychometrics and git import
Add napoleon to the requirements to build our docs
Fix split test child id
Merge pull request #3759 from cpennington/opaque-keys-rtfd-requirements

Add napoleon to the requirements to build our docs
xml export of drafts was exporting everything
now only exports the drafts into the draft subdir
STUD-1627
Merge pull request #3757 from edx/sarina/fix-git_import

Sarina/fix git import
Merge pull request #3760 from edx/sarina/fix-split-test-child-id

Sarina/fix split test child
Merge pull request #3761 from edx/dhm/opaque-export

Dhm/opaque export
Remove package_id and remove lower_ stuff from migrator
STUD-1603