Improve Load Avg Output

[benyanke]

It would really be great to see either an adjusted system load (load / core count), or list the core count. As is, it's difficult to tell what the load effectively means.

I logged into a server the other day and it had a load average of 6.2. depending on which box I had logged in to, 6.2 means very different things!

Another feature request: add arbitrary boxes which output the result of a user defined shell command.