flickr: Use Grilo utilities to compute page values
flickr: Use Grilo utilities to compute page values

Instead of using our custom way of computing page_size, page_number and
page_offset, use grl_pagin_translate().

jasuarez/grilo-plugins,kyoushuu/grilo-plugins,MikePetullo/grilo-plugins,MathieuDuponchelle/grilo-plugins,grilofw/grilo-plugins,GNOME/grilo-plugins,MathieuDuponchelle/grilo-plugins,vrutkovs/grilo-plugins,MikePetullo/grilo-plugins,jasuarez/grilo-plugins,kyoushuu/grilo-plugins,vrutkovs/grilo-plugins,kyoushuu/grilo-plugins,MathieuDuponchelle/grilo-plugins,MikePetullo/grilo-plugins,vrutkovs/grilo-plugins,MathieuDuponchelle/grilo-plugins,grilofw/grilo-plugins,vrutkovs/grilo-plugins,GNOME/grilo-plugins