Uncomment delayed_job dependency, config; Bump

Bumps delayed_job_active_record to latest (4.0.x)

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Remove readonly option on User#passwords relation

Causing an `ActiveRecord::ReadOnlyRecord` to be raised on calling
`User#clean_up_former_passwords`.

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Uncomment duplicate routes, providing unique names

Signed-off-by: Alex Coles <alex@alexbcoles.com>