Adding a SSH Key (If you have existing keys)

Wanted to make a note in the docs (and I wrote this poorly, sorry) that you should maybe have an option for people that already have ssh keys installed. In your doc you assume the user doesn't have an existing id_rsa file. So when I tried your example, it said "Would you like to overwrite id_rsa?"

*No!*

So I figured it might be a good idea to mention that if you do have an existing id_rsa file that you should specifiy a different location for this key. 

Hope this helps. You can reject the pull, but I figured I would try and write it as opposed to bomb you with an email.