Rename "pathos" package to "path".

pkg/path/test/windows_test.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 pathos_windows_test;
+library path.test.windows_test;
 
 import 'package:unittest/unittest.dart';
-import 'package:pathos/path.dart' as path;
+import 'package:path/path.dart' as path;
 
 main() {
   var builder = new path.Builder(style: path.Style.windows,
                                  root: r'C:\root\path');
 
   if (new path.Builder().style == path.Style.windows) {
     group('absolute', () {
       expect(path.absolute(r'a\b.txt'), path.join(path.current, r'a\b.txt'));
       expect(path.absolute(r'C:\a\b.txt'), r'C:\a\b.txt');
       expect(path.absolute(r'\\a\b.txt'), r'\\a\b.txt');
@@ skipping 450 matching lines @@
         Uri.parse('file:///C:/path/to/foo/'));
     expect(builder.toUri(r'C:\'), Uri.parse('file:///C:/'));
     expect(builder.toUri(r'\\hostname\'), Uri.parse('file://hostname/'));
     expect(builder.toUri(r'foo\bar'), Uri.parse('foo/bar'));
     expect(builder.toUri(r'C:\path\to\foo#bar'),
         Uri.parse('file:///C:/path/to/foo%23bar'));
     expect(builder.toUri(r'\\hostname\path\to\foo#bar'),
         Uri.parse('file://hostname/path/to/foo%23bar'));
   });
 }