0.3.2
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* add Applicative constraints for backwards compatibility with GHC 7.8

0.3.1
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* use transformers-compat for backwards compatibility with older versions of transformers

0.3.0.1
-------
* add CHANGES.txt to .cabal file

0.3
---
* add suport for Control.Monad.Except (thus the new dependency constraint 'mtl >= 2.2.1')
