python.pkgs.yamllint: move to separate expression

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

@@ -0,0 +1,24 @@
+{ stdenv, buildPythonPackage, fetchPypi
+, nose, pyyaml }:
+
+buildPythonPackage rec {
+  pname = "yamllint";
+  version = "0.5.2";
+  name = "${pname}-${version}";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0brdy1crhfng10hlw0420bv10c2xnjk8ndnhssybkzym47yrzg84";
+  };
+
+  buildInputs = [ nose ];
+
+  propagatedBuildInputs = [  pyyaml ];
+
+  meta = with stdenv.lib; {
+    description = "A linter for YAML files";
+    homepage = "https://github.com/adrienverge/yamllint";
+    license = licenses.gpl3;
+    maintainers = with maintainers; [ mikefaille ];
+  };
+}