Moved most of html lib generating scripts into tools.

sdk/lib/html/templates/html/dartium/impl_KeyboardEvent.darttemplate

-// 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.
-
-
-/// @domName KeyboardEvent; @docsEditable true
-class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
-
-  factory $CLASSNAME(String type, Window view,
-      [bool canBubble = true, bool cancelable = true, 
-      String keyIdentifier = "", int keyLocation = 1, bool ctrlKey = false,
-      bool altKey = false, bool shiftKey = false, bool metaKey = false,
-      bool altGraphKey = false]) {
-    final e = document.$dom_createEvent("KeyboardEvent");
-    e.$dom_initKeyboardEvent(type, canBubble, cancelable, view, keyIdentifier,
-        keyLocation, ctrlKey, altKey, shiftKey, metaKey, altGraphKey);
-    return e;
-  }
-
-  /** @domName KeyboardEvent.keyCode */
-  int get keyCode => $dom_keyCode;
-  
-  /** @domName KeyboardEvent.charCode */
-  int get charCode => $dom_charCode;
-$!MEMBERS
-}