R1:4aec809b69e2

Update PhamePost for modular transactions

Summary: Updates PhamePost for modular transactions.

Test Plan:
- Create a post
- Edit a post
- Add a header image
- Delete header image
- Award Token
- Leave comment
- Unpublish post
- Check History page
- Move post
- Archive post

{F4936456}

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D17818