Add learning test for db-migrate.
Accept database argument for argumenta-backup.
Add argumenta-migrate script.
Add initial database migration.
Use system config for migration, if present.
Update docs for migrate command.
Use local migration dir, if present.
Clear database before migration tests.
Add missing column to initial migration.
Let mocha handle exceptions during tests.
Add migration for join date and ip.
Update lib and routes for join data.
Update tests for join data.
Use timestamp for join_date.
Improve spacing and type for argument editing.
Add migration for public users view.
Update lib for public user fields.
Update tests for public user fields.
Update API docs.
Update changes file.