Added README.md with command line usage instructions

Author: pdufault

README.md

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+mysqlfragfinder
+===============
+
+finds your fragmented tables...and defragments them
+
+me@host:~/src/mysqlfragfinder $ ./mysqlfragfinder.sh
+MySQL fragmentation finder (and fixer) v1.0.0
+Written by Phil Dufault (phil@dufault.info, http://www.dufault.info)
+Authentication information not found as arguments, nor in .my.cnf
+
+        This script only repairs MyISAM and InnoDB tables
+        --help or -h            this menu
+        --user username specify mysql username to use
+                        using this flag means the script will ask for a password during runtime, unless you supply...
+        --password "yourpassword"
+        --host hostname specify mysql hostname to use, be it local (default) or remote
+        --mysql command specify mysql command name, default is mysql
+        --database      use specified database as target
+                        if this option is not used, all databases are targeted
+        --check only shows fragmented tables, but do not optimize them
+        --detail        additionally display fragmented tables