R1:f6e635c8d279

Transactions - deploy buildTransactionTimeline to remaining applications

Summary:
Ref T4712. Specifically...

- Differential
- needed getApplicationTransactionViewObject() implemented
- Audit
- needed getApplicationTransactionViewObject() implemented
- Repository
- one object needed PhabricatorApplicationTransactionInterface implemented
- setShouldTerminate(true)
- Ponder
- BONUS BUG FIX - leaving a comment on an answer had a bad redirect URI
- both PonderQuestion and PonderAnswer needed…