[RFC] General terminology change

[Christian Neumair <chris gnome-de org>]

Hi there!
I think it would a good idea to avoid expressions like "your machine" or
"your computer" because maybe some users are using but not owning the
machine they're sitting at at the moment.
Especially because of some big companies adopting GNOME this string
change sounds quiet reasonable to me.
Comments on that, please.

see you,
 Chris