Nice up the nodebots.io for International NodeBots Day 2014

Dear NodeBots Team, I've been tinkering with a clean up of the nodebots.io site for a while now, and with NodeBots day around the corner, I think it's finally ready... hope you like it!

![screen shot 2014-07-02 at 23 50 11](https://cloud.githubusercontent.com/assets/58871/3466351/58bd1ebe-027f-11e4-9281-bb482487cff7.png)

The components in the equation were shamelessly ripped from the robots conf site, but I figured as it's @voodootikigod all the way down, it wouldn't be a problem. 

I've tweaked the copy and added a map of the locations that have added themselves to the nodebots day list
![screen shot 2014-07-03 at 00 00 48](https://cloud.githubusercontent.com/assets/58871/3466384/eca53b5c-027f-11e4-8d37-ab4bd18eaef0.png)