Use a real Query class to load daemon information

Summary:
Ref T3557. This stuff does a bunch of nonsense in the View right now. Instead, do it in a real Query class.

Fixes a long-standing bug which prevented "all daemons" from showing more than 3 days' worth of data.

Test Plan: Viewed /daemon/, viewed "All Daemons".

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T3557

Differential Revision: https://secure.phabricator.com/D6544