[issue12661] Add a new shutil.cleartree function to shutil module

[Senthil Kumaran]

Changes by Senthil Kumaran <senthil at uthcode.com>:


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title: [new function] shutil.cleartree -> Add a new shutil.cleartree function to shutil module

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12661>
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