New link to WWW Sql Designer
Recompartiment Chapter 3
Fixed the readme to go along the api changes
Sqlite instructions on ubuntu are clearer
Merge branch 'master' of github.com:lewagon/promo-3-challenges

Conflicts:
	03-AR-Database/01-SQL-design/lib/survey.xml
	03-AR-Database/02-Interacting-with-db/lib/jukebox.xml