Make model organism donor objects admin only.
Replaced tabs with spaces for long labels
Merge pull request #373 from ENCODE-DCC/1683-strain-donor-admin-only

Make model organism donor objects admin only.
Utility to update file objects with AWS migration metadata.
Merge pull request #374 from ENCODE-DCC/1565_fix

Replaced tabs with spaces for long labels
Allow visualization of released and revoked files.
Add progress logging for upgrade.
Add file to upgrade script defaults.
Add 'replaced' to file status enum - we need it for alternate accessions, can rename in a later upgrade if necessary.
log every thousand, not 999/1000...
Merging in master.