Updating optparse-applicative, cblrepo, tasty.

Signed-off-by: Magnus Therning <magnus@therning.org>
Update ghc-mod.

Signed-off-by: Magnus Therning <magnus@therning.org>
Updates 2014-09-16

    aeson
    criterion
    haskell-src-exts
    hlint
    hoogle
    persistent
    persistent-sqlite
    persistent-template
    shake
    stylish-haskell
    taffybar

Additions
    cassava

ghc-mod patch to build with haskell-src-exts:
https://github.com/kazu-yamamoto/ghc-mod/commit/8f123dc7deb8b494f4dae47586d8b4c2658402d9.patch

Signed-off-by: Magnus Therning <magnus@therning.org>