Add a stupid "count objects" script.

This counts the number of unpacked object files and disk space
consumed by them, to help you decide when it is a good time to
repack.

Signed-off-by: Junio C Hamano <junkio@cox.net>

git-count-objects-script

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+. git-sh-setup-script
+
+echo $(find "$GIT_DIR/objects"/?? -type f -print | wc -l) objects, \
+$({
+    echo 0
+    # "no-such" is to help Darwin folks by not using xargs -r.
+    find "$GIT_DIR/objects"/?? -type f -print 2>/dev/null |
+    xargs du -k "$GIT_DIR/objects/no-such" 2>/dev/null |
+    sed -e 's/[ 	].*/ +/'
+    echo p
+} | dc) kilobytes