made status script example of .xinitrc more useful

README

@@ -38,12 +38,12 @@ the DISPLAY environment variable is set correctly, e.g.:
 In order to display status info in the bar, you can do something
 like this in your .xinitrc:
 
-    dwm &
     while true
     do
         xsetroot -name "`date` `uptime | sed 's/.*,//'`"
         sleep 1
-    done
+    done &
+    exec dwm
 
 
 Configuration