Summary: Ref T5179. Ref T4045. I want to move all hunk loads into DifferentialHunkQuery so I can make it do magical things where hunks come from multiple places, handle non-utf8 encodings properly, handle compression, archive into Files, and so on.
Test Plan: Viewed some revisions. Called `differential.getrawdiff`.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T4045, T5179
Differential Revision: https://secure.phabricator.com/D9287
Test Plan:
Enable inline patches:
```
bin/config set metamta.differential.patch-format 'unified'
bin/config set metamta.differential.inline-patches 100000000
```
Create a new diff and confirm it renders correctly via email.
Reviewers: epriestley
Reviewed By: epriestley
CC: Korvin, aran
Differential Revision: https://secure.phabricator.com/D7198
