Log Message:
Update to 5.3.1

Changelog:
2011-08-09 Erwin Waterlander <waterlan@xs4all.nl>
        * Version 5.3.1

2011-08-08 Julio A. Freyre-Gonzalez <jfreyreg@gmail.com>
        * Spanish translation of messages and manual.

2011-06-26 Erwin Waterlander <waterlan@xs4all.nl>
        * bugfix: dos2unix changes ownership and permissions on file.
          When an other user (e.g. root) than the owner has write permission
          on the input file, dos2unix changes owner, group and umask in old
          file mode to the other user's owner, group and umask who runs
          dos2unix. Fixed only for Unix. Thanks to Christopher Williams.
        * Keep permissions also on Windows. Use chmod() i.s.o. fchmod().

2011-06-16 Erwin Waterlander <waterlan@xs4all.nl>
        * Identical functions from dos2unix.c and unix2dos.c
          are moved to common.c.

2011-06-15 Erwin Waterlander <waterlan@xs4all.nl>
        * Dos2unix and Unix2dos share the same language files.

2011-05-04 Erwin Waterlander <waterlan@xs4all.nl>
        * dos2unix.c: Removed redundant ConvertDosToUnixOldFile().
        * unix2dos.c: Removed redundant ConvertUnixToDosOldFile().