EDX-608: Change requirements for ORA2
Merge pull request #184 from yokose-ks/EDX-608

EDX-608: Change requirements for ORA2
EDX-469: Make it possible for only admin user to handle personal information in instructor dashboard.
Merge pull request #185 from yokose-ks/EDX-469

EDX-469: Make it possible for only admin user to handle personal informa...
EDX-501: Make it possible for only admin user to see the link of old dashboard.
Merge pull request #186 from yokose-ks/EDX-501

EDX-501: Make it possible for only admin user to see the link of old das...
EDX-423: Add install settings for PollXBlock
Merge pull request #187 from yokose-ks/EDX-423

EDX-423: Add install settings for PollXBlock
EDX-265: add deactivate_bulk_email command
EDX-598: Fix bulk_email to wrap text length in single line to support MultiByte
EDX-623: do not send to resigned user.
Modify for OpaqueKeys