Changes in version 1.4:

The options "-f, --force", "-F, --recompress", "-k, --keep", and
"-o, --output", have been ported from clzip.

Pdlzip now accepts more than one file in the command line.

Decompression time has been reduced by 5%.

The dependence of "--test" on the existence of "/dev/null" has been
removed.

Configure option "--datadir" has been renamed to "--datarootdir" to
follow GNU Standards.

The target "install-as-lzip" has been added to the Makefile.

The target "install-bin" has been added to the Makefile.
