Added German locale (#4686)

* Added German locale

* Added German locale for pagination

components/calendar/locale/de_DE.tsx

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+import de_DE from '../../date-picker/locale/de_DE';
+export default de_DE;

components/date-picker/locale/de_DE.tsx

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+import CalendarLocale from 'rc-calendar/lib/locale/de_DE';
+import TimePickerLocale from '../../time-picker/locale/de_DE';
+import assign from 'object-assign';
+
+// 统一合并为完整的 Locale
+const locale = {
+  lang: assign({
+    placeholder: 'Datum auswählen',
+    rangePlaceholder: ['Startdatum', 'Enddatum'],
+  }, CalendarLocale),
+  timePickerLocale: assign({}, TimePickerLocale),
+};
+
+// All settings at:
+// https://github.com/ant-design/ant-design/issues/424
+
+export default locale;

components/locale-provider/de_DE.tsx

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+import moment from 'moment';
+moment.locale('de');
+
+import Pagination from 'rc-pagination/lib/locale/de_DE';
+import DatePicker from '../date-picker/locale/de_DE';
+import TimePicker from '../time-picker/locale/de_DE';
+import Calendar from '../calendar/locale/de_DE';
+
+export default {
+  locale: 'de',
+  Pagination,
+  DatePicker,
+  TimePicker,
+  Calendar,
+  Table: {
+    filterTitle: 'Filter-Menü',
+    filterConfirm: 'OK',
+    filterReset: 'Zurücksetzen',
+    emptyText: 'Keine Daten',
+  },
+  Modal: {
+    okText: 'OK',
+    cancelText: 'Abbrechen',
+    justOkText: 'OK',
+  },
+  Popconfirm: {
+    okText: 'OK',
+    cancelText: 'Abbrechen',
+  },
+  Transfer: {
+    notFoundContent: 'Nicht gefunden',
+    searchPlaceholder: 'Suchen',
+    itemUnit: 'Eintrag',
+    itemsUnit: 'Einträge',
+  },
+  Select: {
+    notFoundContent: 'Nicht gefunden',
+  },
+};

components/pagination/locale/de_DE.tsx

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+import de_DE from 'rc-pagination/lib/locale/de_DE';
+export default de_DE;

components/time-picker/locale/de_DE.tsx

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+const locale = {
+  placeholder: 'Zeit auswählen',
+};
+
+export default locale;