Bring Conient in line with new ihost changes.

Most obvious change is the addition of a new data component for
looking at IO statistics. It looks after two attributes and displays
them next to each other. Nothing fancy really, but is suitable for
paging, networking, and diskio.

Used this new IO data component to implement the above mentioned
new data types, and altered the existing disk and memory items
because of a change in the unit size.

Finally, altered the "time till next packet" counter because it
wasn't very accurate - it never seemed to get to zero. It's clock
based now, so should be spot on. Also added a funky feature to make
it go red and grow in the wrong direction when an expected packet
doesn't arrive :-)