message: add entry about SlickLogin
  Added an entry for SlickLogin which had a novel concept for "passwordless" logins using uniquely generated sound tokens. It was acquired by Google and they haven't released a commercial product since.
diff: "description": "Google Code Search was a free beta product from Google which debuted in Google Labs on October 5, 2006, allowing web users to search for open-source code on the Internet.",
  "link": "https://en.wikipedia.org/wiki/Google_Code_Search",
  "name": "Google Code Search"
  + },
  + {
  + "dateClose": "2014-02-17",
  + "dateOpen": "2013-07-13",
  + "description": "SlickLogin was an Israeli start-up company which developed sound-based password alternatives, was acquired by Google and hasn't released anything since.",
  + "link": "https://en.wikipedia.org/wiki/SlickLogin"
  + "name": "SlickLogin"
  }
  ]
  