I took a look at it. It's not a binary. It's a python file (easily readable) that acts as a wrapper for ssh. Extract the contents of the tar.gz[1] for example to see it. It's great if it works because it apparently doesn't need changes to the remote ssh server.

[1] https://launchpad.net/~mohammad-sepent/+archive/ppa/+files/i...

Edit: Non SSL link: http://ppa.launchpad.net/mohammad-sepent/ppa/ubuntu/pool/mai...

To install it under ubuntu:

sudo add-apt-repository ppa:mohammad-sepent/ppa

sudo apt-get update

sudo apt-get install issh

For other distros you can grab the .deb or the source package from the given link.