Various improvements made by vaz-ar#1

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Commits on Dec 13, 2013

Update and rename README to README.md
Arnaud V.
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Update README.md
Arnaud V.
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Moved to python 3, added docstrings, updated display, now show only urls
Arnaud V
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Commits on Dec 14, 2013

Added separate aguments, corrected some display problem, removed the
Arnaud V
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