some minor issues

I ran into 2 really minor issues;
– Sys:Statistics relies on YAML:Syck, but the plugin doesn’t complain if that fails.
– the plugin itself does not mention that the -I option needs 2 -w and -c variables.

and I have a small request as well; on virtual machines using lvm you often have a lot of ‘disks’ attached but most of them are loopback and virtual devices, if you add an option no-fake-disks-for-me-no-sirree (or a shortcut for that), you could loop through the devices in /sys/block/ and use readlink to remove the virtual devices from the list. This saves a lot of output when you don’t want to use -p.