Updating TeXLive to 2013 using updated Debian snapshots.

Kept the old hacks where they don't break the build in case they things
they fix are still relevant.

I checked that the upgrade doesn't break:
1) Asymptote and EProver builds.
2) My XeLaTeX demo from configurations/ repository.
3) Some of my own files.

The upgrade fixes problems with simultaneous use of 3D and LaTeX labels
in Asymptote.

Please provide a test that worked previously and is broken now if you
need to revert this update or its parts.

pkgs/development/libraries/silgraphite/graphite2.nix

@@ -0,0 +1,21 @@
+{ stdenv, fetchurl, pkgconfig, freetype, libXft, pango, fontconfig, cmake }:
+
+stdenv.mkDerivation rec {
+  version = "1.2.3";
+  name = "graphite2-${version}";
+  
+  src = fetchurl {
+    url = "mirror://sourceforge/silgraphite/graphite2/${name}.tgz";
+    sha256 = "1xgwnd81gm6p293x8paxb3yisnvpj5qnv1dzr7bjdi7b7h00ls7g";
+  };
+
+  buildInputs = [pkgconfig freetype libXft pango fontconfig cmake];
+
+  NIX_CFLAGS_COMPILE = "-I${freetype}/include/freetype2";
+
+  meta = {
+    description = "An advanced font engine";
+    maintainers = [ stdenv.lib.maintainers.raskin ];
+    platforms = stdenv.lib.platforms.linux;
+  };
+}