Updated Belarusian translation.
[l10n] Updated Estonian translation
Introduce org.gnome.OnlineAccounts.Photos

This is meant for accounts that can be used to access photos. eg.,
Flickr.
flickr: Implement org.gnome.OnlineAccounts.Photos
Fix and update docs
Prepare 3.7.3
Assamese translation updated
Updated Spanish translation
Updated Hebrew translation.
Updated Lithuanian translation
Updated Norwegian bokmål translation
Updated Slovak translation
Updated Russian translation
Update Arabic translation
Updated Galician translations
l10n: Updated Persian translation
Updated Polish translation
Updated Brazilian Portuguese Translation
Typo
Updated Hungarian translation