This plugin contacts an hddtemp daemon to return the temperature of a drive.

Functions:
  * hddtemp(id) -- connect to local hddtemp daemon (localhost:7634).
  * hddtemp(host,id) -- connect to hddtemp daemon running on the given host.
  * hddtemp(host,port,id) -- connect to hddtemp daemon running on the given host at a custom port.

<code>
Widget SmallHDDTemp { 
    class 'Text' 
    expression hddtemp('/dev/hda') 
    width 4 
    precision 1 
    align 'R' 
    update tick 
}
</code>