grace installation

Location: grace is currently installed under the astrosw account.

set package = "grace-5.1.13"
set location = "/opt/astro"
./configure --enable-grace-home=$location/packages/$package \
--prefix=$location \
--with-extra-incpath="$location/include -I/opt/libpng/include" \
--with-extra-ldpath="$location/lib -L/opt/libpng/include"

make
make tests
make install