Method to update outbox entries. Last error field.
Create DbBindingService and UpdateServices uses it.
First impl of SendOutboxService.
Outbox listeners.
Basic outbox activity.
Run SendOutboxService along with updates.
Avoid NPEs in OutboxTweet.
Sync button on OutboxActivity.
Move Outbox down menu.
OutboxTweet.toString() includes last error.
Click outbox posting error to show outbox.
Fix typo in OutboxTweet.toString().