Create series pages

With the new [collections](http://jekyllrb.com/docs/collections/) feature of Jekyll we can create new kind of contents.

I created the collection "series" and created a file for every serie on the site.

Thanks @thiagogabriel for pairing with me to make this possible! :+1: 

### The series page

![screen shot 2014-10-03 at 7 56 57 pm](https://cloud.githubusercontent.com/assets/145339/4513640/a4169132-4b50-11e4-8b8d-d50bb24d594a.png)

### The episode page

![screen shot 2014-10-03 at 7 58 52 pm](https://cloud.githubusercontent.com/assets/145339/4513656/f0cb2c4a-4b50-11e4-9788-cce650d08eaf.png)