Start moving non-platform libraries from lib/ to pkg/ .

lib/i18n/date_symbols.dart

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-#library("date_symbols");
-
-/**
- * This holds onto information about how a particular locale formats dates. It
- * contains mostly strings, e.g. what the names of months or weekdays are,
- * but also indicates things like the first day of the week. We expect the data
- * for instances of these to be generated out of ICU or a similar reference
- * source. This is used in conjunction with the date_time_patterns, which
- * defines for a particular locale the different named formats that will
- * make use of this data.
- */
-class DateSymbols {
-  final String NAME;
-  final List<String> ERAS, ERANAMES, NARROWMONTHS, STANDALONENARROWMONTHS,
-      MONTHS, STANDALONEMONTHS, SHORTMONTHS, STANDALONESHORTMONTHS, WEEKDAYS,
-      STANDALONEWEEKDAYS, SHORTWEEKDAYS, STANDALONESHORTWEEKDAYS,
-      NARROWWEEKDAYS, STANDALONENARROWWEEKDAYS, SHORTQUARTERS,
-      QUARTERS, AMPMS, DATEFORMATS, TIMEFORMATS;
-  final Map<String, String> AVAILABLEFORMATS;
-  final int FIRSTDAYOFWEEK;
-  final List<int> WEEKENDRANGE;
-  final int FIRSTWEEKCUTOFFDAY;
-
-  const DateSymbols([this.NAME,
-                     this.ERAS,
-                     this.ERANAMES,
-                     this.NARROWMONTHS,
-                     this.STANDALONENARROWMONTHS,
-                     this.MONTHS,
-                     this.STANDALONEMONTHS,
-                     this.SHORTMONTHS,
-                     this.STANDALONESHORTMONTHS,
-                     this.WEEKDAYS,
-                     this.STANDALONEWEEKDAYS,
-                     this.SHORTWEEKDAYS,
-                     this.STANDALONESHORTWEEKDAYS,
-                     this.NARROWWEEKDAYS,
-                     this.STANDALONENARROWWEEKDAYS,
-                     this.SHORTQUARTERS,
-                     this.QUARTERS,
-                     this.AMPMS,
-                     this.DATEFORMATS,
-                     this.TIMEFORMATS,
-                     this.AVAILABLEFORMATS,
-                     this.FIRSTDAYOFWEEK,
-                     this.WEEKENDRANGE,
-                     this.FIRSTWEEKCUTOFFDAY]);
-
-  toString() => NAME;
-}