[Haskell-cafe] Docker image for GHC 7.8.2

For people like me who would like to try out 7.8.2, but don't want to make new creative ways of making your system be able to handle multiple ghc/cabal/etc, I created a docker image. Source code, instructions how to build image yourself, or just pull/run it are here: https://bitbucket.org/k_bx/docker-ghc-7.8 Thanks. // I will make a github mirror once hg-git is fixed back by new dulwich lib release soon