gulpfile - no longer needs to change cwd

it was fixed upstream: https://github.com/tkellen/node-liftoff/issues/16

Just `npm install -g gulp` to update.

gulpfile.js

@@ -1,22 +1,22 @@
-/** 
- * 
+/**
+ *
  *  Web Starter Kit
  *  Copyright 2014 Google Inc. All rights reserved.
- *  
+ *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
  *  You may obtain a copy of the License at
- *  
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- *  
+ *
  *  Unless required by applicable law or agreed to in writing, software
  *  distributed under the License is distributed on an "AS IS" BASIS,
  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  *  See the License for the specific language governing permissions and
  *  limitations under the License
- * 
+ *
  */
- 
+
 'use strict';
 var gulp = require('gulp');
 var $ = require('gulp-load-plugins')();
@@ -28,9 +28,6 @@ var reload = browserSync.reload;
 // public URL for your website
 var PUBLIC_URL = 'https://example.com';
 
-// enable use of relative paths even though gulp is run in sub-directories
-process.chdir(__dirname);
-
 gulp.task('styles', function () {
     return gulp.src('app/styles/sass/styles.scss')
         .pipe($.rubySass({style: 'expanded', precision: 10}))