Rename "status" to "event" in most URIs / classes / etc

Summary: Ref T4375. This doesn't get everything (I figure I'll clean up the actual UI strings when I touch the UIs) but should get the bulk of the URIs and class names and stuff.

Test Plan: Clicked every calendar-related link I could find/grep, they all still seem to work. URIs now say "event".

Reviewers: btrahan, chad

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T4375

Differential Revision: https://secure.phabricator.com/D8147

src/applications/conpherence/controller/ConpherenceController.php

@@ -25,7 +25,7 @@ abstract class ConpherenceController extends PhabricatorController {
       id(new PHUIListItemView())
       ->setName(pht('New Calendar Item'))
       ->setType(PHUIListItemView::TYPE_LINK)
-      ->setHref('/calendar/status/create/')
+      ->setHref('/calendar/event/create/')
       ->addSigil('conpherence-widget-adder')
       ->setMetadata(array('widget' => 'widgets-calendar')));