Documentation in different folder

Move the documentation files to its own folder at /documentation.

This is accomplished using Robru's fork of Jekyll. I changed the Gemfile to point to that fork, until it is merged in Jekyll's master repo.

To get the correct Gem:

`bundle install`

To run jekill

 `bundle exec jekyll --auto --server`


Add a RVM .rvmrc file. It will create a gemset for the website that will isolate gems from different ruby projects. You need to install RVM in order to get that, but it is not a must.