New commands for creating jobs from cronjobs

New commands for creating jobs from cronjobs

* kubed-transient.el (kubed-transient-create-job): New
command.
(kubed-transient-create): Bind it.
* kubed.el (kubed-define-resource): Change binding of
generated 'kubed-create-RESOURCE' to "+" in resource
type-specific prefix map.
(kubed-create-job-from-cronjob): New command.
(job): Refine 'kubed-create-job'.
(kubed-container-images-history): Rename to...
(kubed-container-image-history): ...this.  New variable.
(kubed-read-container-images): Replace with...
(kubed-read-container-image): ...this.  New function.
(deployment, cronjob, kubed-run): Adjust.