haskell-packages.nix: added the old 0.4 version of texmath, so that we can build pandoc 1.6, which is required by Graphalyze

svn path=/nixpkgs/trunk/; revision=28308

pkgs/development/libraries/haskell/texmath/0.4.nix

@@ -0,0 +1,15 @@
+{cabal, parsec, syb, xml} :
+
+cabal.mkDerivation (self : {
+  pname = "texmath";
+  version = "0.4";
+  sha256 = "1rvnhqljxkljy8ncpaj8p7b14nvvm6zmiixv13m1zxlcr457j2ai";
+  propagatedBuildInputs = [ parsec syb xml ];
+  meta = {
+    homepage = "http://github.com/jgm/texmath";
+    description = "Conversion of LaTeX math formulas to MathML.";
+    license = "GPL";
+    platforms = self.stdenv.lib.platforms.haskellPlatforms;
+    maintainers = [ self.stdenv.lib.maintainers.simons ];
+  };
+})