BUG: Series.iteritems should be lazy
Merge pull request #6761 from TomAugspurger/lazy-iteritems

BUG: Series.iteritems should be lazy
ENH: proof of concept notebook for conditional formatting of dataframes HTML export
First run at API + usage examples

Add md and latex, abstract class names, template fixes
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Merge branch 'template-formatting' of https://github.com/TomAugspurger/pandas into template-formatting
add my style constructor

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