Add initial version of create_rule_files.sh
Initial version of regression_script, a fork of the v1.6 original.
rules: support a separate rules dir

Update rule file create script to support a separate rules
output dir. Also, add more flowbit rules and fix the stripping
of leading # and \t chars.
script: clean ups and fail saves

Clean up the script.

Save pcap, rule, yaml to a separate "fails" directory.