Do nothing on Windows instead of exception due to 'ls' and 'chmod' not found#13

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leo-ccin2p3 wants to merge 1 commit intoitaliangrid:masterfrom

ccin2p3:windows

Commits on Nov 25, 2014

Do nothing on Windows (the Globus way) instead of exception due to 'ls'
leo-ccin2p3
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