Winrm server certgen command

Install certificate to the store, create winrm listener.
Our output here should be more clear about what should be done with the output files. Here's what ssh keygen does: the important thing is that it distinguishes between public and private key material, so the user knows to protect the private key:
```
Your identification has been saved in ./funstuff.
Your public key has been saved in ./funstuff.pub.
The key fingerprint is:
95:86:c0:65:c4:05:6e:ab:d3:ff:4b:1b:fe:da:5a:9d adamedwards@seaedwards01
The key's randomart image is:
+--[ RSA 2048]----+
|     ..+=o.      |
|      .+.. .     |
|        + +      |
|       . +       |
|        S        |
|       o       ..|
|      o .   o .E.|
|       . . o =   |
|          ..B=o  |
+-----------------+
```