Fix errors with recent gnuplot versions
-rw-r--r-- 358 LICENSE
-rwxr-xr-x 1129 base.gnuplot
-rw-r--r-- 5984 data.dat
-rwxr-xr-x 3375 full_range_monthly.gnuplot
-rwxr-xr-x 3299 full_range_seasonal.gnuplot
-rwxr-xr-x 2541 modular_cartesian.gnuplot
-rwxr-xr-x 3361 modular_polar.gnuplot