fixing .gitignore
generated tutoials controller
Added crawl and sectionizer classes

also created the index and create actions and the tutorial#index view
Changed the way the Seccionns are handled

Now the page url is passed to a Sectionizer objet instead of a Crawler object
also added sectionize_tutorial method skeleton to tutorials_controller
enabled tutorial show view

now is posible to see the tutorials through sections
also added toogle behavior so, when the user clicks a
title the content will show up
fixed bug while displaying title contents
Merged all branches successfully