[Structure] New structure using multiple categories

  - Categories. There are no posts, but there are some drafts to help
    development
    - News
    - Job Offers
    - Events
  - Calendar plugin was made available
  - Member page created from YAML data
  - 404 Page redirecting to home

TODO:
  - Use SASS or SCSS
  - Put real information
[Layout] New layout using SASS and ATOM/RSS feeds

- New layout using SASS and bootstrap.
- Better handling of many or no posts on Home.
- Turbolinks =)

TODO:
  - Unify feed templates (rm feed-category.xml)
  - Use per category pagination.