[Yeti DNS Discuss] Logo added to wiki, README.md tweaks, dnscap doc added

[Shane Kerr]

All,

I did some documentation stuff for Yeti today.

If you go to the web site you'll see our honkin' new logo:

http://yeti-dns.org/

I also did some minor tweaks to formatting on the README.md on GitHub,
based on Davey's new information:

https://github.com/BII-Lab/Yeti-Project/blob/master/README.md

Also, I put a document explaining the limitations of using dnscap for
our data capture:

https://github.com/BII-Lab/Yeti-Project/blob/master/doc/Capture.md

Cheers,

--
Shane