Update README.md

Author: poddmo

README.md

@@ -1,22 +1,13 @@
-Imported from http://www.ahammer.ch/141
 
-lvmcache-statistics.sh displays the LVM cache statistics
-in a user friendly manner
+lvmcachestat displays LVM cache statistics. This repository aims to rework an earlier utility to output in similar format to iostat.
 
-Copyright (C) 2014 Armin Hammer 
-
-This program is free software: you can redistribute it and/or modify 
-it under the terms of the GNU General Public License as published by 
-the Free Software Foundation, either version 3 of the License, or (at 
-your option) any later version.
-
-This program is distributed in the hope that it will be useful, but 
-WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
-or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 
-for more details.
-
-You should have received a copy of the GNU General Public License along 
-with this program. If not, see http://www.gnu.org/licenses/.
+Usage:
+```
+lvmcachestat VolumeGroup/LogicalVolume
+```
 
 History:
-20141220 hammerar, initial version
+- Copyright (C) 2014 Armin Hammer 
+- 20141220: hammerar: initial version
+- 20161230: rocketraman: Fix core and policy args count
+- 20230309: poddmo: rename to lvmcachestat.  Begin to recode the output in the style of iostat