Add Haskell support.

Added support for Haskell. Selected three packages to get somewhat different programming styles represented: a compiler (GHC), the package system library (Cabal), and the efficient string representation library (Bytestring)

Here are direct download links for the source files needed:

http://hackage.haskell.org/package/Cabal-1.20.0.1/Cabal-1.20.0.1.tar.gz
http://hackage.haskell.org/package/bytestring-0.10.4.0/bytestring-0.10.4.0.tar.gz
http://www.haskell.org/ghc/dist/7.8.2/ghc-7.8.2-src.tar.bz2