Write the really awesome documentation (guacamolegem.org)

* [x] Buy and configure guacamolegem.org
* [ ] Create a layout like [Zepto](http://zeptojs.com)'s
* [ ] Write an overview for the concept of Guacamole (What is a Model? What is a Collection?)
* [ ] Give a walkthrough through all functionality with pointers to other resources (Virtus doc for example)
* [ ] Provide advice about popular third party gems like Fabricator, authentication gems etc.