python.pkgs.flask_assets: move to a separate file

pkgs/development/python-modules/flask-assets/default.nix

@@ -0,0 +1,20 @@
+{ lib, buildPythonPackage, fetchurl, flask, webassets, flask_script, nose }:
+
+buildPythonPackage rec {
+  name = "Flask-Assets-${version}";
+  version = "0.12";
+
+  src = fetchurl {
+    url = "mirror://pypi/F/Flask-Assets/${name}.tar.gz";
+    sha256 = "0ivqsihk994rxw58vdgzrx4d77d7lpzjm4qxb38hjdgvi5xm4cb0";
+  };
+
+  propagatedBuildInputs = [ flask webassets flask_script nose ];
+
+  meta = with lib; {
+    homepage = http://github.com/miracle2k/flask-assets;
+    description = "Asset management for Flask, to compress and merge CSS and Javascript files";
+    license = licenses.bsd2;
+    maintainers = with maintainers; [ abbradar ];
+  };
+}