- Move ps/locale.c to ex/locale.c, since it has nothing to do with Process/Thread...

- Move ps/locale.c to ex/locale.c, since it has nothing to do with Process/Thread management (locale settings are part of the executive).
- Cleanup formatting in the file and add proper credits (Thomas and Eric).
- Create internal Exp* functions for Setting/Getting the user langid, since they need to be called 2, 3 times by other code and thus shared.
- Remove some deprecated code, make the functions themselves initialize the default ID when called for the first time (which should be done by winlogon --> it seems this isn't done yet?).
- Set default locale to 0x409 instead of 0x0.

svn path=/trunk/; revision=23133