Création de l'entité Stage, avec ajout et affichage des stages.

.gitignore

.metadata/.lock

.metadata/.lock_info

.metadata/.log

.metadata/.mylyn/.taskListIndex/segments_1

.metadata/.mylyn/.taskListIndex/write.lock

.metadata/.mylyn/.tasks.xml.zip

.metadata/.mylyn/repositories.xml.zip

.metadata/.mylyn/tasks.xml.zip

.../.plugins/org.eclipse.buildship.core/gradle/versions.json

...ore.resources/.history/0/d069105b9ff6001f1f3fe49bcac05cc6

...re.resources/.history/13/40ec135b9ff6001f1f3fe49bcac05cc6

...re.resources/.history/27/700fc518a1f6001f1f3fe49bcac05cc6

...ore.resources/.history/5/3015ae41a1f6001f1f3fe49bcac05cc6

...re.resources/.history/54/a0e2955a9ff6001f1f3fe49bcac05cc6

...re.resources/.history/57/c024155b9ff6001f1f3fe49bcac05cc6

...re.resources/.history/6d/006a9931a1f6001f1f3fe49bcac05cc6

...re.resources/.history/92/e001135b9ff6001f1f3fe49bcac05cc6

...re.resources/.history/94/e0143745a1f6001f1f3fe49bcac05cc6

...re.resources/.history/a2/60c9115b9ff6001f1f3fe49bcac05cc6