Javadoc view et autres (v1)

...va/fr/univlille/sae/classification/ClassificationApp.java

src/main/java/fr/univlille/sae/classification/Main.java

...ava/fr/univlille/sae/classification/utils/Observable.java

.../java/fr/univlille/sae/classification/utils/Observer.java

.../java/fr/univlille/sae/classification/utils/ViewUtil.java

...ava/fr/univlille/sae/classification/view/AddDataView.java

...r/univlille/sae/classification/view/AxesSettingsView.java

...ivlille/sae/classification/view/ChooseAttributesView.java