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.)
diff --git a/Lib/distutils/dist.py b/Lib/distutils/dist.py
index a0c6c9e..998cff7 100644
--- a/Lib/distutils/dist.py
+++ b/Lib/distutils/dist.py
@@ -154,6 +154,8 @@
         self.ext_package = None
         self.include_dirs = None
         self.extra_path = None
+        self.scripts = None
+        self.data = None
 
         # And now initialize bookkeeping stuff that can't be supplied by
         # the caller at all.  'command_obj' maps command names to