Merge pull request #2123 from NNPDF/polarised-scale-variation

nnpdf_data/nnpdf_data/theory_cards/20000000.yaml

nnpdf_data/nnpdf_data/theory_cards/20000001.yaml

nnpdf_data/nnpdf_data/theory_cards/20001001.yaml

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nnpdf_data/nnpdf_data/theory_cards/20001007.yaml

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nnpdf_data/nnpdf_data/theory_cards/20001009.yaml

nnpdf_data/nnpdf_data/theory_cards/20001010.yaml

nnpdf_data/nnpdf_data/theory_cards/20002001.yaml

nnpdf_data/nnpdf_data/theory_cards/20002002.yaml

nnpdf_data/nnpdf_data/theory_cards/20002003.yaml

nnpdf_data/nnpdf_data/theory_cards/20002004.yaml

nnpdf_data/nnpdf_data/theory_cards/20002005.yaml

nnpdf_data/nnpdf_data/theory_cards/20002006.yaml

nnpdf_data/nnpdf_data/theory_cards/20002007.yaml

nnpdf_data/nnpdf_data/theory_cards/20002008.yaml