+ Show timezones in output to better distingush times.
+ Update README/usage examples.
+ The -h flag only prints the shorter usage message (which is
more likely to fit on a single page).
+ A new 'help' argument displays the full help message.
Previously, the zone check compared time.Local and time.UTC. However,
when this was tested on a machine that uses UTC locally, it became
apparent that the two pointers can differ while having the same time
zone. A more useful check is to look up the offsets for the time zones
and compare those --- they'll return the same times.
Kyle Isom
Kyle Isom