Defer saving counters on update; set them during syncing--for efficiency purposes
Locally save changes made during syncing--but avoiding save machinery.  Get un-countered models to sync--and sync just once :)
Merge branch 'signing_at_sync' of github.com:bcipolli/ka-lite into counters_at_sync

Conflicts:
	kalite/securesync/engine/__init__.py
Merge branch 'signing_at_sync' of github.com:bcipolli/ka-lite into counters_at_sync

Conflicts:
	kalite/securesync/engine/__init__.py
Forgot to add flag to avoid trying to set counters.
Merge pull request #749 from bcipolli/counters_at_sync

Raspberry Pi: Update record counter when syncing, not when saving