Let rzip operate on pipes

Taken from here: http://www.rachinsky.de/nicolas/misc.shtml

This patch enables rzip to read data from stdin and/or write data to stdout.
It needs to be tested more. So use it on your own risk. More documentation
needs to follow.

Examples:
some-command | rzip -o out.rz -q temporary-file or rzip -d -Q TMP some.rz | some-command