ekmett/tagged-transformer — pull request #8 by crockeea (2014-06-21 02:34:46+00:00)
Title: TaggedT to MTL style

This commit has several changes:

1. Added -XPolyKinds
2. Created a type synonym `Tagged s b` a la mtl
3. Added functions from Data.Tagged, most with versions for Tagged and TaggedT.