add scripts/README.md with the SHA commands

Author: ilg-ul

scripts/README.md

@@ -0,0 +1,22 @@
+The original scripts were intended to run independently, but it is preferred
+to run the Eclipse launchers.
+
+To compute the SHA sums, go to the archive folder and run:
+
+```bash
+do_compute_sha() {
+  # $1 shasum program
+  # $2.. options
+  # ${!#} file
+
+  file=${!#}
+  sha_file="${file}.sha"
+  "$@" >"${sha_file}"
+  echo "SHA: $(cat ${sha_file})"
+}
+
+for f in *.zip *.gz 
+do
+  do_compute_sha shasum -a 256 -p ${f}
+done
+```