Launch website

Last issue after everything else is finished.

- [x] check each page that will be published if it has the bullet point in the menu with the 2013 edition
- [x] update pdf files
- [x] move the old `index.php` in a `placeholder.php`, explain it's use
- [x] put a redirect for the 2014 edition
- [ ] test drive the application form
- [ ] write on the facebook wall of the event
- [ ] publish stuff on social networks