Use phabricator_ time functions in more places

Summary:
Replace some more date() calls with locale-aware calls.

Also, at least on my system, the DateTimeZone / DateTime stuff didn't actually
work and always rendered in UTC. Fixed that.

Test Plan:
Viewed daemon console, differential revisions, files, and maniphest timestamps
in multiple timezones.

Reviewed By: toulouse
Reviewers: toulouse, fratrik, jungejason, aran, tuomaspelkonen
CC: aran, toulouse
Differential Revision: 530

src/applications/daemon/controller/console/PhabricatorDaemonConsoleController.php

@@ -22,7 +22,11 @@ class PhabricatorDaemonConsoleController extends PhabricatorDaemonController {
     $logs = id(new PhabricatorDaemonLog())->loadAllWhere(
       '1 = 1 ORDER BY id DESC LIMIT 15');
 
+    $request = $this->getRequest();
+    $user = $request->getUser();
+
     $daemon_table = new PhabricatorDaemonLogListView();
+    $daemon_table->setUser($user);
     $daemon_table->setDaemonLogs($logs);
 
     $daemon_panel = new AphrontPanelView();