Add a new 'format-webkitpy' command that will reformat code to the style guide.

Tools/Scripts/webkitpy/thirdparty/README.chromium

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 Code in this directory must document the license under which the source is being 
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+Name: autopep8
+Short Name: autopep8
+URL: https://pypi.python.org/packages/source/a/autopep8/autopep8-1.0.3.tar.gz#md5=7c16d385cf9ad7c1d7fbcfcea2588a56
+Version: 1.0.3
+License: MIT
+License File: NOT_SHIPPED
+Security Critical: no
+Description: Used to reformat python code via format-webkitpy
+Local Modifications: None
+
 Name: BeautifulSoup - HTML parser
 Short Name: BeautifulSoup
 URL: http://www.crummy.com/software/BeautifulSoup/download/3.x/BeautifulSoup-3.2.1.tar.gz (?)
 Version: 3.2
 License: MIT
 License File: NOT_SHIPPED
 Security Critical: no
 Description: Used during the w3c import, other places
 Local Modifications: None
 
@@ skipping 22 matching lines @@
 URL: https://code.google.com/p/pywebsocket/
 Version: 0.7.9 (?)
 License: BSD
 License File: NOT_SHIPPED
 Security Critical: no
 Description: used by run-webkit-tests and run-webkit-httpd to test web sockets
 Local Modifications: None
 
 Name: pep8 - A Python style guide checker
 Short Name: pep8
-URL: http://pypi.python.org/packages/source/p/pep8/pep8-0.5.0.tar.gz#md5=512a818af9979290cd619cce8e9c2e2b
-Version: 0.5.0
+URL: https://pypi.python.org/packages/source/p/pep8/pep8-1.5.7.tar.gz#md5=f6adbdd69365ecca20513c709f9b7c93
+Version: 1.5.7
 License: MIT
 License File: NOT_SHIPPED
 Security Critical: no
-Description: Used during presubmit checks and via lint-webkitpy. There is
+Description: Used during presubmit checks and via lint-webkitpy and format-webkitpy. There is
     overlap between pep8 and pylint, but pep8 catches a bunch of stylistic
         issues that pylint doesn't (e.g., warning about blank lines, various whitespace issues, etc.).
 Local Modifications: None