mate: remove major-ver and minor-ver

Keep only the version atribute in derivations, with the full version
string of the package. This will make it easier to write a script for
automatic updating of the packages using the update-source-version
command from common-updater-scripts.

pkgs/desktops/mate/caja-dropbox/default.nix

@@ -1,13 +1,11 @@
-{ stdenv, fetchurl, pkgconfig, gtk3, caja, pythonPackages }:
+{ stdenv, fetchurl, pkgconfig, gtk3, mate, pythonPackages }:
 
 stdenv.mkDerivation rec {
   name = "caja-dropbox-${version}";
-  version = "${major-ver}.${minor-ver}";
-  major-ver = "1.18";
-  minor-ver = "0";
+  version = "1.18.0";
 
   src = fetchurl {
-    url = "http://pub.mate-desktop.org/releases/${major-ver}/${name}.tar.xz";
+    url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
     sha256 = "18wd8abjaxa68n1yjmvh9az1m8lqa2wing73xdymz0d5gmxmk25g";
   };
 
@@ -17,7 +15,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     gtk3
-    caja
+    mate.caja
     pythonPackages.python
     pythonPackages.pygtk
     pythonPackages.docutils