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. 

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)