IoRate and more...

    * Configuration file: user can defines limits
    * Display limits in the help screen
    * Add per process IO (read and write) rate in B per second
      IO rate only available on Linux from a root account
    * If CPU iowait alert then sort by processes by IO rate
    * Per CPU display IOwait (if data is available) 
    * Process column style auto (underline) or manual (bold) 
    * Display a sort indicator (is space is available)
    * Change the table key in the help screen