I hate to be snarky but having read through the code this really isn't a big thing. It's a tool for people that can't use .ssh/config.

Manage your SSH like a boss? Perhaps, but only in the pointy-haired can't-read-man-ssh_config boss sense of the word.

For those that don't want to install a script and would prefer to understand the tools they already have try this:

http://nerderati.com/2011/03/simplify-your-life-with-an-ssh-...