new feature in yum-langpacks - langinstall/langremove

[Bill Nottingham]

Christopher Meng (cickumqt at gmail.com) said: 
> I suggest yum switchlang
> 
> I think someone may install two or more langpacks in parallel.

Installing of multiple language packs has always been completely supported.
(Heck, "yum langinstall '*'" should work, as long as you've got disk space.)

But switching of the runtime language isn't yum's job.

Bill