Don't re-link already linked files, UI enhanced

While creating hard links, check if they're already linked first.
    This saves SUBSTANTIAL time in Time Machine directories where many
    files are already hard links.

    Also, be clearer when running about what exactly it is we're doing
    with each file.

dirdedupe.sh

@@ -78,16 +78,24 @@ do
     if [ -f "${shadowfile}" ]; then
       masterfile="${shadowfile/#${shadowdir}/${masterdir}}"
       if [ -f "${masterfile}" ]; then
+        if [ "${shadowfile}" -ef "${masterfile}" ]; then
+          echo "ID   \"${masterfile}\" <-> \"${shadowfile}\""
+        else
           cmp -s "${masterfile}" "${shadowfile}"
           if [ $? -eq 0 ]; then
             if [ $REALLYRUN -gt 0 ]; then
-            echo "Linking \"${masterfile}\" <-- \"${shadowfile}\""
+              echo "LINK \"${masterfile}\" <-- \"${shadowfile}\""
               ln -Pf "${masterfile}" "${shadowfile}"
             else
-            echo "NOT linking \"${masterfile}\" <-- \"${shadowfile}\""
+              echo "HYPO \"${masterfile}\" <~~ \"${shadowfile}\""
-          fi
-        fi
             fi
+          else
+            echo "MOD  \"${masterfile}\" <X> \"${shadowfile}\""
+          fi # end check for file equality
+        fi # end check for inode equality
+      else
+        echo "NEW  \"${shadowfile}\" "
+      fi # end check if master file exists
     fi
 done