Allow user to scale any developer-defined job-times

If the developer set the times too short/long for the user's computing cluster, then it would be great if that could be updated from the command line.

I will add support for uniform scaling. This should be good for users with slower (or faster) machines than expected by the pipeline developer. It can also deal with users with larger or smaller datasets as long as the duration of the different tasks has a similar scaling with data size.

changed the description

mentioned in merge request !37 (merged)

mentioned in commit fc4ef4fb

closed with merge request !37 (merged)