Use AFNetworking to load deep link photos.
Remove queryForImageWithImageId in GTLQueryFSH because the function has just been replaced by AFNetworking
Removed queryForImagesByFriendsInThemeId from GTLQueryFSH by replacing functionality with AFNetworking in ThemeManager
Fixing URL to not include beginning slash.
ThemeManager uses AFNetworking for getting all photos but still uses GTL for getting photos from friends.