Changelog for pandoc-types-1.16.1

[1.16.1] * Allow aeson 0.11.*. * Export pandocTypesVersion from Text.Pandoc.Definition. [1.16.0.1] * Use deepseq instead of deepseq-generics. deepseq now allows deriving generic NFData instances, so we don't need deepseq-generics. * Removed unneeded instance, use OVERLAPPING pragma for ghc 7.10. * Added CPP so that deepseq-generics is used for ghc < 7.10. * Added tested-with, generate .travis.yml using make_travis_yml.hs * Added stack.yaml [1.16] * Added Attr field to Image and Link. * Added SoftBreak constructor to Inline