Emit progress as running.
Explicitly set TZ=UTC and ISO date format.

The default output of date(1) is difficult to parse and confusing.

This is compounded by using non-UTC datestamps.
Use OptionParser instead of hand parsing argv.
Add facility to fixup date(1) date to ISODATE.

This can be used to fixup old logs from EagleEye before the
switch to isodate format.
Expect ISODATE format instead of date(1) output.

This makes the graphs easier to read as it cleans up
the X axis and since R understands ISODATE it fixes
some other issues we were having with data that had
large values causing overflows.