README improvements

Modified the README to include installation instructions
and synchronized command line and README usage message.

README.md

@@ -1,33 +1,79 @@
-# tmimport
-    Time Machine Importer
+**Time Machine Utilities**
+==========================
 
-    tmimport.sh <backup drive>
 
-    Time Machine Importer modifies the metadata of a backup drive to match the 
-    current computer's model and unique identifiers (primary MAC address and
-    hardware platform UUID/provisioning UDID) and attempts to 'inherit' the
-    backup history.
+**Installation**
+----------------
+Simply save the utility in your system path and mark it as executable.
 
-    The backup drive should be specified by disk or volume name (or path) or
-    the mount point of the backup drive. If Time Machine Importer cannot find
-    an appropriate disk volume or mount point, it will check to see if the 
-    specified directory is a valid Backups.backupdb location (or a machine
-    directory under one).
+If you don't know your system path, you can find it with this Terminal command:
 
-    A future version may attempt to detect HFS+ or APFS partitions serving as
-    backup drives, and, if a backup drive is specified as a device path, it
-    will automagically choose the correct backup path.
+    echo "${PATH}"
+
+To mark a utility as executable, use the `chmod` command:
+
+    chmod +x tmimport.sh
+    chmod +x dirdedupe.sh
+
+If you're still lost, do this:
+  1. In your Home folder, create a new folder called `.bin`
+  2. Download and save the utilities to your new `.bin` folder
+  3. Use a text editor to open `.zshrc` (or `.bash_profile` on older Macs)
+     from your Home folder and add the following line at the end:
+
+     `PATH=${PATH}:${HOME}/.bin`
+
+  4. In Terminal, run the following commands:
+
+     `chmod +x ~/.bin/*.sh`
+
+  5. Quit (or restart) the Terminal.
+   
+______________________________________________________________________________
+
+
+**tmimport**
+------------
+    TIME MACHINE IMPORT
+
+    USAGE
     
-# dirdedupe
-    Directory De-Duplication ("Dirty Dupe")
+        tmimport.sh <backup drive>
+    
+    DESCRIPTION
+    
+        Time Machine Importer modifies the metadata of a backup drive to match the 
+        current computer's model and unique identifiers (primary MAC address and
+        hardware platform UUID/provisioning UDID) and attempts to 'inherit' the
+        backup history.
+    
+        The backup drive should be specified by disk or volume name (or path) or
+        the mount point of the backup drive. If Time Machine Importer cannot find
+        an appropriate disk volume or mount point, it will check to see if the 
+        specified directory is a valid Backups.backupdb location (or a machine
+        directory under one).
+    
+        A future version may attempt to detect HFS+ or APFS partitions serving as
+        backup drives, and, if a backup drive is specified as a device path, it
+        will automagically choose the correct backup path.
+______________________________________________________________________________
 
-    dirdedupe.sh [--execute] masterdir shadowdir
 
-    For each file in shadowdir, replace it with a hard link to the matching file
-    (if any) in masterdir.  A file will be considered a match if, and only if, it
-    shares the same file name, relative path, and contents.
+**dirdedupe**
+-------------
+    DIRECTORY DE-DUPLICATOR
+
+    USAGE
+    
+        dirdedupe.sh [--execute] masterdir shadowdir
+
+    DESCRIPTION
+
+        For each file in shadowdir, replace it with a hard link to the matching file
+        (if any) in masterdir.  A file will be considered a match if, and only if,
+        it shares the same file name, relative path, and contents.
 
     OPTIONS
 
-       --execute  Actually remove and link duplicate files. By default, this 
-                  program runs in test mode. 
+        --execute  Actually remove and link duplicate files. By default, this 
+                   program runs in test mode.