Add method to enable ssh logins w/ password

I have a large user base that still use passwords for authentication rather than keys and unfortunately I need this setting enabled.  I have a highly elastic environment and the recent changes to the SSL ciphers resulted in a bunch of EC2 instances being spun up that many people could not ssh into with their passwords.  I had been using puppet to add this snippet directly into the gem, but I assumed version 0.2.0 rather than the new version you just published.  

If you could add this method so I can strip it from my puppet stuff, it would be greatly appreciated it.

Thanks

Ryan