How to login with putty instead of using the windows CMD

We need to make it clear these are step-by-step instructions. E.g., First download [puttyget](http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html). Next, open the private key... etc.

Also, code samples and CLI text needs to be code-styled by putting it in backticks (`). 

Also, note correct capitalization: SSH, PuTTY, Boot2Docker.