Fixes path to step link in readme.md

Fixe path to user-story markdown docs. Fixe name of user-stoyr-final
directory.
update doc for user-story1
Added clarification to user-story-1-1 and changed the complement to 10 as written in the user-story
Used @reflectable instead of @observable which better as these attributes do not need to be observable (no change occurs). @observable will be used for favorite attribute in another user-story.
Started user-story 2
Merge pull request #6 from stefrem/Corrections

Corrections
User-story-2 modified: much more simple to do !
Removed template.html which is not used anymore
Correction des numérotations des puces + ajout d'une précision pour l'étape 4 de "Ajoutons des données dynamiques..."
Tentative pour réparer la liste ordonnée du bloc "Ajoutons..."
test
retest
Test
User-Story-3 updated : more code is provided to attendees
Arrangement de la liste ordonnées de l'étape "Ajoutons..."
Merge pull request #8 from ruizb/master

Correction de petites erreurs et ajout d'une remarque
Merge remote-tracking branch 'upstream/master'