Github tiles

This is a start after wrestling with Gh3... it's pretty cool once I got the hang of it, but to test I had to add a simple express server so I could get the data from the github api. Also had to make a couple of small changes to not send some headers when on localhost.

I think we need to work out more definition around what a component is and how to structure the css/javascript/html and examples.

For now, you can see that it's a jQuery plugin that takes options to which user to pull and the 2 elements for the featured list and repos list. I can update these to look for elements with a specific data attribute if that'll be better. Also, I'll need a way to add a list of featured repos that should be shown. Right now, I'm just showing them in alpha order and the top 3 are shown.