Integrate details from Slurm (or any external scheduler) in CLI

[arteymix]

Off the top of my head:

• job identifier
• allocated node name/hostname
• walltime, CPU usage, etc.

This could be done by exposing parameters in the task definition.

[arteymix]

In #12, I've added the task ID as comment. It's also possible to pull task details from any Scheduler that implements methods that provide task status message, progress, etc.

[arteymix]

Status message is implemented. I intend to support tracking progress for job arrays in #14.