combine merge
combine chagnes
Merge branch 'master' of https://github.com/GrinnellTextbookLendingLibrary/GTLLDatabase
Revert to pre-user commit
Migrated Managers table to Users table, renamed necessary files
Added some layout link tests
Added manager column to Users table
Removed deprecated renaming plugin
Added manager protections for user and book actions
Layout links manager tests passing
adding a book instance to layoutlinks spec
updated layout links tests
Added manager checkbox to new usre form