Merge pull request #3 from art-manager/master

Merge du principal
Merge branch 'master' of https://github.com/Fanghornn/art-manager into local
Class js widget, artwork, album
Merge stable widget+panels
Update AUTHORS.md
Class parent + getters et setter des class js
Merge branch 'master' of https://github.com/Fanghornn/art-manager
merge clean des 2 repos