servo: Merge #10590 - Package tidy (from edunham:package-tidy); r=larsbergstrom

This fixes https://github.com/servo/servo/issues/861.

@askeing, I've copied your work from https://github.com/askeing/servo_tidy and attributed the commit to you. My commit in this PR is Git housekeeping to preserve `tidy`'s history. If you'd like to make additional changes, I've given you and @shinglyu push access to my fork of Servo. Apologies if this is already familiar, but the workflow for pushing to my branch is:

```
$ git remote add edunham git@github.com:edunham/servo.git
$ git checkout -b package-tidy
$ git pull edunham package-tidy
$ git push edunham package-tidy
```

Once this lands, I'll look at how to publish it to PyPI and automate that process.

Please don't merge this yet; we still need to discuss how the change should work around https://github.com/servo/servo/blob/master/python/servo/testing_commands.py#L33 , as I've yet to figure out how to get the egg to actually expose its tests.

Source-Repo: https://github.com/servo/servo
Source-Revision: bfe54539d290cb287e59e8ba106a54a3fab6201a

servo/python/tidy/setup.py

@@ -0,0 +1,50 @@
+# Copyright 2013 The Servo Project Developers. See the COPYRIGHT
+# file at the top-level directory of this distribution.
+#
+# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+# option. This file may not be copied, modified, or distributed
+# except according to those terms.
+
+import os
+from setuptools import setup, find_packages
+
+
+VERSION = '0.0.1'
+
+install_requires = [
+]
+
+here = os.path.dirname(os.path.abspath(__file__))
+# get documentation from the README and HISTORY
+try:
+    with open(os.path.join(here, 'README.rst')) as doc:
+        readme = doc.read()
+except:
+    readme = ''
+
+try:
+    with open(os.path.join(here, 'HISTORY.rst')) as doc:
+        history = doc.read()
+except:
+    history = ''
+
+long_description = readme + '\n\n' + history
+
+if __name__ == '__main__':
+    setup(
+        name='servo_tidy',
+        version=VERSION,
+        description='The servo-tidy is used to check licenses, '
+                    'line lengths, whitespace, flake8 on Python files, lock file versions, and more.',
+        long_description=long_description,
+        keywords='mozilla servo tidy ',
+        author='The Servo Project Developers',
+        author_email='dev-servo@lists.mozilla.org',
+        url='https://github.com/servo/servo',
+        packages=find_packages(exclude=['ez_setup', 'examples', 'tests']),
+        package_data={},
+        install_requires=install_requires,
+        zip_safe=False,
+    )