Syncing doesn't also sync timestamps

[dandv]

Hey Max,

Good to see you back improving PinDroid! Any chance to fix the following issue, since you've added pull-to-sync in the latest version?

When I pulled-to-sync, the sync was performed, but the timestamps of all bookmarks was wrong. At pinboard.in, everything appears bookmarked as "yesterday", when in fact I had bookmarked those pages 1 to 3 weeks ago. I did have auto-sync off at times in order to save battery (though not for the duration of the entire 3 weeks), but PinDroid should store internally when the bookmark was pinned, too, and sync that. Assuming, of course, the API allows pushing timestamps.