ghc 7.10.1 RC1 requires FlexibleContexts https://ghc.haskell.org/trac/ghc/wiki/Migration/7.10#Inferredtype-signaturesnowmayrequiretoenableFlexibleContextsGADTsorTypeFamilies
ghc 7.10.1 RC1 requires FlexibleContexts https://ghc.haskell.org/trac/ghc/wiki/Migration/7.10#Inferredtype-signaturesnowmayrequiretoenableFlexibleContextsGADTsorTypeFamilies

jkr/pandoc-citeproc,adunning/pandoc-citeproc,jgm/pandoc-citeproc