new serializers for common use cases#17

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sheppard merged 7 commits intomasterfrom

Sep 16, 2015

Commits on Sep 3, 2015

Commits on Sep 4, 2015

set index_none_value for unstacking
sheppard
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Commits on Sep 6, 2015

Commits on Sep 9, 2015

ensure blank column name
sheppard
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