vim: Update from 7.4.23 -> 7.4.131

Instead of applying all of the patches, this build pulls an archive from
the source code repo with all of the patches already applied. This is the
preferred way from http://www.vim.org/sources.php

pkgs/applications/editors/vim/default.nix

@@ -1,12 +1,12 @@
-{ stdenv, fetchurl, ncurses, gettext, pkgconfig }:
+{ stdenv, fetchhg, ncurses, gettext, pkgconfig }:
 
 stdenv.mkDerivation rec {
-  patchLevel = "23";
-  name       = "vim-7.4.${patchLevel}";
+  name = "vim-7.4.131";
  
-  src = fetchurl {
-    url    = "ftp://ftp.vim.org/pub/vim/unix/${name}.tar.bz2";
-    sha256 = "1pjaffap91l2rb9pjnlbrpvb3ay5yhhr3g91zabjvw1rqk9adxfh";
+  src = fetchhg {
+    url = "https://vim.googlecode.com/hg/";
+    tag = "v7-4-131";
+    sha256 = "1akr0i4pykbrkqwrglm0dfn5nwpncb9pgg4h7fl6a8likbr5f3wb";
   };
 
   enableParallelBuilding = true;
@@ -44,16 +44,6 @@ stdenv.mkDerivation rec {
   #   sed -i -e 's/as_fn_error.*int32.*/:/' src/auto/configure
   # '';
 
-  prePatch = "cd src";
-  
-  patches =
-    [ ./patches/7.4.001 ./patches/7.4.002 ./patches/7.4.003 ./patches/7.4.004
-      ./patches/7.4.005 ./patches/7.4.006 ./patches/7.4.007 ./patches/7.4.008
-      ./patches/7.4.009 ./patches/7.4.010 ./patches/7.4.011 ./patches/7.4.012
-      ./patches/7.4.013 ./patches/7.4.014 ./patches/7.4.015 ./patches/7.4.016
-      ./patches/7.4.017 ./patches/7.4.018 ./patches/7.4.019 ./patches/7.4.020
-      ./patches/7.4.021 ./patches/7.4.022 ./patches/7.4.023 ];
-
   meta = with stdenv.lib; {
     description = "The most popular clone of the VI editor";
     homepage    = http://www.vim.org;