less verbose output

[monperrus]

Hi, oai-harvest is great but has a very verbose output (see below).

How to get a silent output?

Thanks,

--Martin

DEBUG    Writing to file /home/martin/martin-no-backup/arxiv-classifier/data/oai:arXiv.org:1003.0006.arXiv.xml
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DEBUG    Writing to file /home/martin/martin-no-backup/arxiv-classifier/data/oai:arXiv.org:1407.7261.arXiv.xml
DEBUG    Writing to file /home/martin/martin-no-backup/arxiv-classifier/data/oai:arXiv.org:1501.00129.arXiv.xml
DEBUG    Writing to file /home/martin/martin-no-backup/arxiv-classifier/data/oai:arXiv.org:1506.08655.arXiv.xml
DEBUG    Writing to file /home/martin/martin-no-backup/arxiv-classifier/data/oai:arXiv.org:1508.06785.arXiv.xml
DEBUG    Writing to file /home/martin/martin-no-backup/arxiv-classifier/data/oai:arXiv.org:1511.01375.arXiv.xml
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DEBUG    Writing to file /home/martin/martin-no-backup/arxiv-classifier/data/oai:arXiv.org:1601.01001.arXiv.xml
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