[wp-polyglots] Local sites improvements

[Nikolay Bachiyski]

A couple pre-3.0 improvements of the package builder:

* It can pull translations from translate.wordpress.org. dist/ files
are still pulled from svn.
* The interface is simpler.
* The theme option is gone. From now one everybody has to use either
the i18n-ed kubrick for old versions.
* The fields are saved between builds. It annoyed me a lot.
* If you choose to pull translations from translate.wordpress.org, the
Twenty Ten translation is also taken from there.
* The source code will be available on http://code.trac.wordpress.org/
at some point next week.

There might be a bug or two, so please, give it a try today.

Happy translating,
Nikolay.