Update 2014-12-16

Update packages:

    mime-mail
    skein

Update dependencies from [haskell-core]:

    HStringTemplate
    aeson
    attoparsec
    bifunctors
    case-insensitive
    comonad
    conduit
    conduit-extra
    contravariant
    either
    free
    hashable
    http-client
    http-client-tls
    http-conduit
    http-types
    lifted-base
    monad-logger
    pandoc
    pandoc-types
    profunctors
    resourcet
    scientific
    semigroupoids
    semigroups
    th-orphans
    uniplate
    unordered-containers
    uuid
    void
    xml-conduit

Signed-off-by: Nicola Squartini <tensor5@gmail.com>