Updated Polish translation
flickr: name sources created from goa by their id

When source is created from GOA config, dont use user name as a source-id
but use goa id (account_somenumber) instead
-

https://bugzilla.gnome.org/show_bug.cgi?id=700517
Updated Czech translation
Release 0.2.8
Post-release version bump to 0.2.9