feature: Support sudo & SSH connection options

[cmacrae]

These changes (based on @arouzing's initial work, thank you!) introduce
configuration options for SSH connections and add support for using sudo.

Tested thoroughly on several systems and works as expected :)
I also fixed a bug on initial deploys by adding the --mkpath arg to rsync, otherwise systems fail to deploy on initial attempt.

[pinpox]

Hey @cmacrae, thanks a ton for this PR!

I reviewed the code and it looks good, just one question: I see you have removed the set -o pipefail -e; in https://github.com/pinpox/lollypops/pull/14/files#diff-206b9ce276ab5971a2489d75eb1b12999d4bf3843b7988cbe8d687cfde61dea0R101-R125
Those where necessary to stop deployment if any error occurs. Without those the execution will continue on error, which I think is a bad idea. Have you found a better solution?

I know it's a bit repetitive to add that to every SSH command, but there is not a way to add it in general (yet), see more about it here

[cmacrae]

You're very welcome! Thanks for sharing this awesome tool ✨
Ah, whoops! That was unintentional. I'll add them back shortly after I've finished my work day :)

[cmacrae]

There we go, added back in :)