Merge pull request #40 from jsafrane/devel/devconf-fixes

Two storage script fixes
Introduce 'lmi storage' multiplexer.

All storage commands are now under 'lmi storage'.
Do not show DeviceID in lists.
    
DeviceID is internal OpenLMI ID to identify block devices. It's quite long
and most admins will use '/dev/sda' (or just 'sda') anyway, so let's remove
it from all 'list' commands output.
    
'show' command will show it, if anybody is interested.