Patch from Bastien Kleineidam:

adds the 'install_data' and 'install_scripts' commands; these two
are trivial thanks to the 'install_misc' base class in cmd.py.
(Minor tweaks and commentary by me; the code is untested so far.)

Lib/distutils/command/install_data.py

@@ -0,0 +1,14 @@
+from distutils.cmd import install_misc
+
+class install_data (install_misc):
+
+    description = "install data files"
+
+    def finalize_options (self):
+        self._install_dir_from('install_data')
+
+    def run (self):
+        self._copydata(self.distribution.data)
+
+    def get_outputs (self):
+        return self._outputdata(self.distribution.data)