GenerateMAC: Review for Release

Hey, guys. I think the GenerateMAC goodie by @UnGround is ready to go, but I'd like to get some feedback on it. I removed the "More at ..." link because the site that it links to is not actually the source of the MAC address so it can be confusing. 

I could also add in the trigger word "media access control address", but I don't think people actually search using that.

Here are some examples:
- https://ddh5.duckduckgo.com/?q=generate+mac+address
- https://ddh5.duckduckgo.com/?q=random+mac+address

![screen shot 2014-03-25 at 11 32 23 am](https://f.cloud.github.com/assets/81969/2513737/b0db5f5c-b432-11e3-8fba-fdf909e307cf.png)