Use ms, not sec, for elapsed time

[rwdaigle]

The standard, as far as I can tell amongst the libraries I use, is to print elapsed/execution time in ms (to 2 decimal places), not seconds as Scrolls does. I'm advocating to see output such as:

action=email-import at=finish elapsed=31.21

Instead of the current:

action=email-import at=finish elapsed=0.031

If this is agreeable then I'll submit a pull request.

[asenchi]

@rwdaigle Hmm, yeah i agree. I wonder how if a change to this currently would clobber existing metrics?

I am working on a cleanup of scrolls and fixing a lot of issues, I'll add this to that. I am hesitant to change this in the current releases.

[rwdaigle]

Yeah, agree on breaking existing metrics. Few thoughts:

• Make the unit of time configurable and default to secs.
• Print the units in the output. E.g. 31.21s and 0.031ms

[asenchi]

This is fixed in the v2 branch, I'll be merging that sometime this week.