Merge pull request #4654 from phadej/parsec-only

.travis.yml

Cabal/Cabal.cabal

Cabal/Distribution/PackageDescription/Parsec.hs

Cabal/Distribution/PackageDescription/Parsec/Legacy.hs

Cabal/Distribution/Parsec/Class.hs

Cabal/Distribution/Parsec/Lexer.hs

Cabal/Distribution/Parsec/Types/Common.hs

Cabal/Distribution/Simple.hs

Cabal/Distribution/Types/GenericPackageDescription.hs

Cabal/tests/DiffInstances.hs

Cabal/tests/ParserHackageTests.hs

Cabal/tests/ParserTests.hs

Cabal/tests/ParserTests/regressions/Octree-0.5.cabal

Cabal/tests/ParserTests/regressions/encoding-0.8.cabal

Cabal/tests/StructDiff.hs

Makefile

appveyor.yml

boot/Lexer.x

cabal-install/Distribution/Client/Check.hs

cabal-install/Distribution/Client/Configure.hs