Changelog of @hackage/thrist 0.4

Release history:
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[0.3.0.2] Change of repository hosting
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[0.3.0.1] Support for (GHC v7.8.2) Added some @Applicative@ instances, prepared for the AMP proposal
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[0.3] Support for (GHC v7.6.1) @PolyKinds@ extension, this compiler is required now
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[0.2] Several new functions introduced, some renamed
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[0.1] Initial version