New cxs v4.20

Changes:

• New option –[no]bayes (currently in BETA). Naive Bayesian probabability scanning of script files. This option uses an enhanced Naive Bayes algorithm to report a probability that a scanned script is an exploit. This is achieved through a trained corpus (database). See the cxs documentation for more details.
• Additions to main decoder regex
• Exploit fingerprint definitions database additions