ISO8601 for timestamps

Hi,

It would be very convenient to use ISO8601 for all timestamps emitted. Currently, with 1.0, it’s using a custom international format (date in yyyy/mm/dd and timezone added) for the log, but a custom, American style date for the console. Please switch to ISO8601 format everywhere, it makes it easier to parse logs and use tooling to work with logs. I’d provide a pull request, but I have 0 experience with Go, I’m afraid.

Thank you!