Pysub-dl

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* Refactored code

v.0.3.1
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* Fixed bug and update doc

v.0.3.2
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* Fixed unicode decode issue

v.0.3.3
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* Fixed unicode decode issue

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* Added support for python >= 2.3

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* Fixed bug: converted string 'xmlcharrefreplace' to 'utf-8' encoding.

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* Added verbose downloader.

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* Organised argparser code. pushed the code to main.

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* Extracts subtitles from the zip file and removes the zip file automatically.