fix non-microsite SUBDOMAIN_BRANDING defaults
Make staff view work w/ pure xblocks (that only have a descriptor system)
Fix strings to avoid dangling commas
Internal/External Studio file URLs

- Changed link URL of file name to use public/LMS url
- Added toggle link to display all public URLs for instructor convenience
The correct LTI keyword is "roles", not "role"

This is only a correction in the documentation
add new feature to make sure we aren't writing PII into the application logs. So far we're aware of doing so regarding Auth use-cases
Add test of local_resource_url in AcidBlock
Add tests of more scopes in student_view
Mark xblock initialization status using css class (in part to make testing easier)
Remove doc-ready tests, which were flaky
Assets Page Template Update

For embed vs. external URLs

STUD-1338
removed dup'd paragraph
Update Zooming Image doc to reference file on files.edx.org
Ignore all my probs
Merge pull request #2720 from edx/sarina/ignore-probs

Ignore all my probs
Typo corrections
Merge pull request #2722 from edx/sylvia/documentation/BLD-847

Update Zooming Image doc to reference file on files.edx.org
Merge pull request #2603 from cpennington/xblock-acid-resources-test

Add tests of local_resource_url
Added nimisha to AUTHORS file.
splash-url-exclusion: Exclude '/heartbeat' from redirect

Update the dependency to load this commit:
https://github.com/edx-solutions/django-splash/commit/6e8bd685214aebe78d0cfdf5572e27c5f1bc357a

Which allows to prevent `/heartbeat` from being redirected, which is
necessary on production servers