Add `Foldable.foldMapM` and `Reducible.reduceMapM`#1452

Merged

johnynek merged 1 commit intotypelevel:masterfrom peterneyens:foldMapM-reduceMapM

Jan 3, 2017

+117-4

Commits on Nov 5, 2016

Add Foldable.foldMapM and Reducible.reduceMapM
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