Metamodel module => WIP

client/src/app/admin/admin.module.ts

client/src/app/app.module.ts

client/src/app/metamodel/store/effects/database.effects.ts

client/src/app/metamodel/store/effects/survey.effects.ts

...t/src/app/metamodel/store/selectors/attribute.selector.ts

...app/metamodel/store/selectors/criteria-family.selector.ts

.../app/metamodel/store/selectors/dataset-family.selector.ts

client/src/app/metamodel/store/selectors/dataset.selector.ts

client/src/app/metamodel/store/selectors/group.selector.ts

...nt/src/app/metamodel/store/selectors/instance.selector.ts

...app/metamodel/store/selectors/output-category.selector.ts

...c/app/metamodel/store/selectors/output-family.selector.ts

client/src/app/metamodel/store/selectors/survey.selector.ts