This pull request just exists to have a place to put comments.  Please don't pull!

Okay, I updated natty to accept a comma-delimited stuns parameter
```
➜  natty git:(master) ✗ natty -debug -offer -stuns "stun:stun.l.google.com:19302,stun1.l.google.com:19302"
[000:000] STUN server is stun:stun.l.google.com:19302,stun1.l.google.com:19302,stun.ideasip.com
```
If the stuns parameter is missing, it defaults to stun:stun.l.google.com:19302