another bone head fail here. hopefully can leave this alone meow...
newID does not get inlined, but doesn't allocate to trigger any stack
expansion either. net perf hit on my laptop is 5ns, and we get a test out of
it. it will push a new stack, so it's not negligible overhead and we could
avoid it. we could keep the logic in both places just to have a test for it
separate instead of re-using the function in the hot path. up to us.
go vet caught some nifty bugs. so fixed those here, and also made it so that
we vet everything from now on since the robots seem to do a better job of
vetting than we have managed to.
also adds gofmt check to circle. could move this to the test.sh script (didn't
want a script calling a script, because $reasons) and it's nice and isolated
in its own little land as it is. side note, changed the script so it runs in
100ms instead of 3s, i think find is a lot faster than go list.
attempted some minor cleanup of various scripts
