Remove sadbox depenency and add go.mod file

[bozaro]

Unfortunatelly github.com/dayvonjersen/sadbox looks like abandoned repository with multiple death references inside.

[dayvonjersen]

what.

iirc that sadbox thing is just something I found on google code that was when they were like "google code is shutting down forever! you'll never get to see any of these projects ever again!" so I backed it up

unless you're implying that I'm dead in which case guess again

also, never adding .mod files to this or any other Go project of mine unless there's a literal gun to my head

[dayvonjersen]

@bozaro I'm sorry I closed this so hastily. Now that go mod is required for new packages I'm finding that it's not so bad.
I was wrong, please forgive me. It'd have been much easier for me to just type go mod init than re-open and merge this but I will audit and merge and adjust if necessary if that's cool with you

or I could let it go. your call :)