pythonPackages.dropbox: Move to own file

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

@@ -0,0 +1,24 @@
+{ stdenv, buildPythonPackage, fetchPypi
+, pytestrunner, requests, urllib3, mock, setuptools }:
+
+buildPythonPackage rec {
+  pname = "dropbox";
+  version = "8.0.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0bixx80zjq0286dwm4zhg8bdhc8pqlrqy4n2jg7i6m6a4gv4gak5";
+  };
+
+  # Set DROPBOX_TOKEN environment variable to a valid token.
+  doCheck = false;
+
+  buildInputs = [ pytestrunner ];
+  propagatedBuildInputs = [ requests urllib3 mock setuptools ];
+
+  meta = with stdenv.lib; {
+    description = "A Python library for Dropbox's HTTP-based Core and Datastore APIs";
+    homepage = https://www.dropbox.com/developers/core/docs;
+    license = licenses.mit;
+  };
+}