deutsch installation

Location: deutsch is currently installed under /opt/astro.
deutsch is an IDL add on. Download the deutsch.tar.gz file from the WWW site. Deutsch has no version number, so I take the date of the last listed change as the version number.
set package = "deutsch-<version>"
set location = "/opt/astro"
mkdir $location/IDL/$package
cd $location/IDL/$package
tar -zxf deutsch.tar.gz
mv deutsch/* .
rmdir deutsch