Move sunflower to a new directory, make final tweaks to make it all work.

lib/runtime/dart_runtime.js

 // Copyright (c) 2015, 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.
 
+// TODO(jmesserly, sigmund): remove these two lines:
+var math = Math;
+var core = core || {int: { parse: Number }, print: e => console.log(e) };
+
 var dart;
 (function (dart) {
   var defineProperty = Object.defineProperty;
   var getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
   var getOwnPropertyNames = Object.getOwnPropertyNames;
 
   // Adapted from Angular.js
   var FN_ARGS = /^function\s*[^\(]*\(\s*([^\)]*)\)/m;
   var FN_ARG_SPLIT = /,/;
   var FN_ARG = /^\s*(_?)(\S+?)\1\s*$/;
@@ skipping 333 matching lines @@
     var init = this[name];
     var result = void 0;
     if (init) result = init.apply(this, arguments);
     return result === void 0 ? this : result;
   };
   // The initializer for Object
   core.Object.prototype.Object = function() {};
   core.Object.prototype.constructor = core.Object;
 
 })(dart || (dart = {}));