setup.py yields DistUtilsExtra.auto error

Hi, I added a premature preinst script, and though the installation of pylang succeeded with a "no clean" builddeb, builddeb -S failed. DistUtils didn't recognize 2 files in the "no clean" build, but the building proceeded anyway without a problem. At builddeb -S, DistUtils didn't recognize 4 files.

Please look at the contents of the newly-updated pylang package. I would like some help in making preinst work.

Also see the output from my console:
http://pastebin.com/UcCzh58K

Something interesting just happened. After customizing my devscripts.conf and running debuild in the root directory [1], I started to have a different sort of errors.

Now, when I run bzr builddeb -S, I get this message:

```bash
john@kotux:~/pylang/pylang$ bzr builddeb -S
Building using working tree
Building package in normal mode
Purging the build dir: /home/john/pylang/build-area/pylang-0.0.4
Looking for a way to retrieve the upstream tarball
Upstream tarball already exists in build directory, using that
bzr: ERROR: An error (1) occurred running quilt:

Applying patch 01_desktop_fix.patch
patching file pylang.desktop.in
Hunk #1 FAILED at 1.
1 out of 1 hunk FAILED -- rejects in file pylang.desktop.in
Patch 01_desktop_fix.patch can be reverse-applied

john@kotux:~/pylang/pylang$
```

[1] http://www.debian.org/doc/manuals/maint-guide/build.en.html#debuild

Let me also mention that adding a preinst script did not fix the setup.py installation problem. I don't know how the bzr builddeb worked.

Do you think of setup.py installs, then signed builddeb would work too?

```bash
john@kotux:~/pylang/pylang$ sudo python setup.py install
[sudo] password for john:
running install
running build
running build_py
running build_i18n
intltool-update -p -g pylang
running build_icons
running build_help
running install_lib
running install_data
running install_egg_info
Removing /usr/local/lib/python2.7/dist-packages/pylang-0.0.4.egg-info
Writing /usr/local/lib/python2.7/dist-packages/pylang-0.0.4.egg-info
WARNING: the following files are not recognized by DistUtilsExtra.auto:
  INSTALL
  bin/pylang
john@kotux:~/pylang/pylang$
```

Fixed in the latest upload to the ubuntu repositories.

Sitting in new queue

Regards
Bhavani