Move material Input component into sky/framework

sky/framework/input.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import '../../framework/fn.dart';
-import '../../framework/theme/colors.dart';
-import 'editable_string.dart';
-import 'editable_text.dart';
-import 'keyboard.dart';
+import 'editing/editable_string.dart';
+import 'editing/editable_text.dart';
+import 'editing/keyboard.dart';
+import 'fn.dart';
+import 'theme/colors.dart';
 
 typedef void ValueChanged(value);
 
 class Input extends Component {
   static final Style _style = new Style('''
     display: paragraph;
     margin: 8px;
     padding: 8px;
     border-bottom: 1px solid ${Grey[200]};
     align-self: center;
@@ skipping 37 matching lines @@
   Node build() {
     return new Container(
       style: _style,
       inlineStyle: _focused ? _focusedInlineStyle : null,
       children: [
         new EditableText(value: _editableValue, focused: _focused),
       ]
     );
   }
 }