R1:3fcd9c93f186

Use Application PHIDs in Files

Summary: Ref T2715. Move files to the new stuff.

Test Plan: Used `phid.query`; `phid.lookup` to find files.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T2715

Differential Revision: https://secure.phabricator.com/D6523