Progress information for jobset-wait

[mikepurvis]

Related to #57, it would be great if the jobset-wait command could give status info like:

(23/700) Build of xxx succeeded on yyy, logs: http://zzz
(24/700) Build of xxx succeeded on yyy, logs: http://zzz
(25/700) Build of xxx failed on yyy, logs: http://zzz
Evaluation failed, aborting remaining steps.

I know this is a gap right now in the Hydra API— I had hoped the constituents API was this, but it's something totally different. But yeah, for the case where hydra-cli is being used to puppet Hydra builds from some other CI platform (Jenkins, GitLab CI, etc), it's pretty important to provide something more than just "not done yet" -> "done".