Littlehttpserver

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* update packaging dependency
* drop Python 2.6 support

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* add __main__.py to run as a python script with "-m" option

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* change to use pytest-pep8 for PEP8 compliance
* improve to be able to get package name with no version number

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* add to be able to extend the argument parser with parent parser
* refactoring (matching regular expression, testing)

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* add "-i, --indexdir" option

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* first release