update documentation
update documentation

pedubreuil/ionic-wizard,lykmapipo/ionic-wizard,harellevy/ionic-wizard,dbartel/ionic-wizard,cristoferdomingues/ionic-wizard,cristoferdomingues/ionic-wizard,arielfaur/ionic-wizard,arielfaur/ionic-wizard,471685249/ionic-wizard,pedubreuil/ionic-wizard,dbartel/ionic-wizard,471685249/ionic-wizard,harellevy/ionic-wizard,lykmapipo/ionic-wizard