pidgin-msn-pecan: fix source and pname&version

pkgs/applications/networking/instant-messengers/pidgin-plugins/msn-pecan/default.nix

···
-{ lib, stdenv, fetchurl, pidgin} :
+{ lib, stdenv, fetchFromGitHub, pidgin} :
 
-stdenv.mkDerivation {
-  name = "pidgin-msn-pecan-0.1.4";
-  src = fetchurl {
-    url = "http://msn-pecan.googlecode.com/files/msn-pecan-0.1.4.tar.bz2";
-    sha256 = "0d43z2ay9is1r2kkc9my8pz0fwdyzv7k19vdmbird18lg7rlbjd2";
+stdenv.mkDerivation rec {
+  pname = "pidgin-msn-pecan";
+  version = "0.1.4";
+  src = fetchFromGitHub {
+    owner = "felipec";
+    repo = "msn-pecan";
+    rev = "v${version}";
+    sha256 = "0133rpiy4ik6rx9qn8m38vp7w505hnycggr53g3a2hfpk5xj03zh";
   };
 
   meta = {