enable GIO support in GTK package

The flag enable-gio is True by default, so I suppose we should also
build GTK with GIO in nixpkgs. The hackage haddocks are also built with
GIO enabled, so it can be confusing if GIO is disabled in nixpkgs' gtk
version and thus some functions that are documented on hackage are
missing.
Merge pull request #70 from bennofs/gtk-gio-support

enable GIO support in GTK package
Remove hard-coded license string for 'hflags'.

Instead, the package should provide accurate information: <https://github.com/errge/hflags/issues/9>.
Patch 'cpphs' into thyme's the build tools stanza to fix the build.

https://github.com/liyang/thyme/issues/28
The 'jackaudio' attribute is called 'jack2'.
Update post-process hook for Agda.
cabal2nix.cabal: tentatively bump version number for release
Update post-process hook for ghc-mod.
hackage4nix.hs: update badPackagePaths for the new Agda stdlib path
Remove the 'sed' patch to ghc-mod; it breaks the module for me (Emacs 24.x, Linux/x86_64).
Add post-process hook for cookie package.
release.nix: add code that enables release builds on all available platforms
hackage4nix.hs: don't re-generate broken packages
hackage4nix.hs: change the logic of 'updateNixPkgs' so that all packages
have been discovered before the re-generation process starts.
hackage4nix: disable Hydra builds for all "old" Haskell packages

Old means that we have a newer version in Nixpkgs already. If there is a reason
for the old package to still exist, i.e. because some other package is still
referring to it, then Hydra will still build the package as a dependency, but
we won't want to build old packages on their own right.
Pretty-print the meta.maintainer section as

  maintainers = with self.stdenv.lib.maintainers; [ foo ];

to make maintainer lists with multiple entries less verbose.
release.nix: run official Hydra builds with the latest GHC only
lapack in extra-libs refers to liblapack (hmatrix)
hmatrix no longer itself depends on gsl
Merge pull request #74 from Fuuzetsu/hmatrix-libs

lapack in extra-libs refers to liblapack (hmatrix)