2009-02-14  (0.1) Initial Release
2009-02-14  (0.2) Switch to Tom Corwine's yubikey PHP auth method
2009-02-16  Change error message to match standard username/password error
            Update README/INSTALL files
2009-02-17  (0.3) Add option to add separate input box for OTP
2009-02-19  (0.4) SECURITY: Authenticate given OTP in preferences to prevent future use
2009-03-12  (0.5) Add ability to enter a backup yubikey id
                  Update OTP detection logic to permit the use of a Yubikey in static mode
2009-03-21  (0.6) Add custom service api url support
2009-03-21  (0.6.1) Update error detection and notification
2009-04-03  (0.7) Update plugin based on feedback from Squirrelmail devs
2009-05-02  (0.8) Update plugin based on additional feedback from Squirrelmail devs
2009-05-02  (0.8.1) A few last updates