Summary:
- Set a default edit policy to match view policy for projects
- It seems like initializeNew* is a better init function than new Phabricator*,
so ported two classes to use it and spot-checked the others (this also fixed
a fatal.)
- Other minor bugs
Test Plan: Ran lipsum for a while without any fatals
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: epriestley, jhurwitz, Korvin
Differential Revision: https://secure.phabricator.com/D13559