Make staff view work w/ pure xblocks (that only have a descriptor system)
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
Merge pull request #2603 from cpennington/xblock-acid-resources-test

Add tests of local_resource_url