Adds a new package: cherrytree - A hierarchical note taking application

cherrytree - A hierarchical note taking application, featuring rich text
and syntax highlighting, storing data in a single xml or sqlite file.

This commit also adds PyGtkSourceView - a Python wrapper for the GtkSourceView widget library.

Official page http://www.giuspen.com/cherrytree

pkgs/development/python-modules/pygtksourceview/default.nix

@@ -0,0 +1,16 @@
+{ stdenv, fetchurl, python, pkgconfig, pygobject, glib, pygtk, gnome2 }:
+
+let version = "2.10.1"; in
+
+stdenv.mkDerivation {
+  name = "pygtksourceview-${version}";
+
+  src = fetchurl {
+    url = "http://ftp.gnome.org/pub/gnome/sources/pygtksourceview/2.10/pygtksourceview-${version}.tar.bz2";
+    sha256 = "0x2r9k547ad68sfddr5am341ap6zvy8k0rh3rd0n38k7xdd7rd5l";
+  };
+
+  patches = [ ./codegendir.patch ];
+
+  buildInputs = [ python pkgconfig pygobject glib pygtk gnome2.gtksourceview ];
+}