Batch annotation

js/store/annotation.js

js/store/display.js

js/store/elements.js

js/store/index.js

test/store/annotation.js

test/store/auth.js

test/store/display.js

test/store/elements.js

test/store/index.js

test/testhelpers.js

vue/Element/AnnotationPanel.vue

vue/Element/CreationForm.vue

vue/Element/EditionForm.vue

vue/Element/Main.vue

vue/Element/PanelHeader.vue

vue/Image/ElementZone.vue

vue/Image/InteractiveImage.vue

vue/Image/Tools.vue

vue/Navigation/ChildrenTree/ChildrenTree.vue

vue/Navigation/ChildrenTree/TreeItem.vue