Add catv (separate applet instead of cat -v).  Also cleanup cat.c comments,
the following of which (from cat.c) belongs in svn history instead of the
source code:

/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
 *
 * This is a new implementation of 'cat' which aims to be SUSv3 compliant.
 *
 * Changes from the previous implementation include:
 * 1) Multiple '-' args are accepted as required by SUSv3.  The previous
 *    implementation would close stdin and segfault on a subsequent '-'.
 * 2) The '-u' options is required by SUSv3.  Note that the specified
 *    behavior for '-u' is done by default, so all we need do is accept
 *    the option.
 */

diff --git a/coreutils/cat.c b/coreutils/cat.c
index 9645f61..37237ec 100644
--- a/coreutils/cat.c
+++ b/coreutils/cat.c
@@ -4,41 +4,14 @@
  *
  * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * Licensed under GPLv2 or later, see file License in this tarball for details.
  */
 
 /* BB_AUDIT SUSv3 compliant */
 /* http://www.opengroup.org/onlinepubs/007904975/utilities/cat.html */
 
-/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
- *
- * This is a new implementation of 'cat' which aims to be SUSv3 compliant.
- *
- * Changes from the previous implementation include:
- * 1) Multiple '-' args are accepted as required by SUSv3.  The previous
- *    implementation would close stdin and segfault on a subsequent '-'.
- * 2) The '-u' options is required by SUSv3.  Note that the specified
- *    behavior for '-u' is done by default, so all we need do is accept
- *    the option.
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <unistd.h>
 #include "busybox.h"
+#include <unistd.h>
 
 int cat_main(int argc, char **argv)
 {