Attribute list => WIP

.../admin/containers/attribute/attribute-list.component.html

.../admin/containers/attribute/attribute-list.component.scss

...pp/admin/containers/attribute/attribute-list.component.ts

client/src/app/metamodel/store/actions/attribute.actions.ts

client/src/app/metamodel/store/actions/column.actions.ts

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

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

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

.../src/app/metamodel/store/effects/output-family.effects.ts

client/src/app/metamodel/store/models/column.model.ts

client/src/app/metamodel/store/models/index.ts

client/src/app/metamodel/store/reducers/attribute.reducer.ts

client/src/app/metamodel/store/reducers/column.reducer.ts

client/src/app/metamodel/store/reducers/index.ts

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

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

client/src/app/metamodel/store/services/column.service.ts

client/src/app/metamodel/store/services/database.service.ts

client/src/app/metamodel/store/services/index.ts