Parallel commands

[marcosh]

closes #41

@schell I created a first draft of the functionality, possibly to get a first feedback from you.

I wanted also to ask you the following question: currently, when I try to run commands in parallel, the whole sos process goes to background. Is this the default behaviour for concurrently? Is there an easy way to keep everything in the foreground?

[schell]

I didn't think concurrently would switch the output in the background so it's likely something else - see my PR comments inline.

[schell]

This is a good start. I'm a little wary of the command syntax though, as well as the Template type in general. Actually I think it's fine.

After you address the requested changes (using mapConcurrently and unlines) I'll check out the code and play around with it.

Thank you! Good work!

[marcosh]

Thanks for the feedback! I fixed the things you mentioned.

Before merging I'd like to do some renaming and possibly introduce some type aliases. But before doing that I'd be happy to see the code working correctly

[marcosh]

@schell sorry for bothering you, did you have the chance to play a bit with the code?

[schell]

Sorry @marcosh - I've been in the middle of a move.

[marcosh]

don't worry, I just feared you missed my previous message. No hurry