[Shotwell] translation updates for 0.5

[Matthias Clasen]

Hey, I have gotten at least one bug report in Fedora
https://bugzilla.redhat.com/show_bug.cgi?id=583847 asking about
translation updates (for Russian). I note that the 0.5 release that we
have in F13 _does_ have Russian translation, but the .po file is
largely empty, while trunk seems to have pretty complete translations.
I don't know about the amount of string changes between 0.5 and trunk,
and I wonder if it would be possible to merge the translations from
trunk into 0.5 and do a 0.5.2 release that largely focuses on
translation updates ? I'm sure it would be well-received in Fedora 13.

Keep up the great work,

Matthias