Create detect_kippo.rb - Detect Kippo SSH Honeypots

First contribution to Metasploit. probably sucks, feel free to make suggestions, etc.
Hah, @hmoore-r7: https://cultofthedyingsun.wordpress.com/2014/09/12/death-by-magick-number-fingerprinting-kippo-2014/comment-page-1/#comment-1.