Add cronjob README to scripts directory

scripts/README.md

+# Cron jobs
+
+```
+# AOSS Ceilo
+*/5 * * * * /opt/metobs/aoss_ceilo/scripts/start_ceilo_ingest.sh &> /dev/null
+*/2 * * * * /opt/metobs/aoss_ceilo/scripts/archive_ceilo.sh > /dev/null 2>&1
+# legacy scripts that have not been ported yet
+#*/5 * * * * /data1/software/aoss-ceilo/scripts/do_ceilo_nc_gen.sh > /dev/null 2>&1
+#*/10 * * * * /data1/software/aoss-ceilo/scripts/do_ceilo_image_gen.sh > /dev/null 2>&1
+```
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