0.2.0 -> 0.2.1
added -d <dev> option to select the device that should observe, e.g. hda or sda
	(thanks to Carles Garrigues and krakov)
added small point befor IOR and IOW only if the change of IOR or IOW was to small
	to display with the scale. Result:  .IOR or .IOW

0.1.1 -> 0.2.0
added support for kernel 2.6.x
fixed small bugs

0.1.1 -> 0.1.2
fixed division by zero bug, if no swapfile available (thanks Joćo Paulo F Farias)

0.1.0 -> 0.1.1
added mem correction option (-m) // used=total-free-cached-buffers
patched width calc at r_io and w_io