Rename DiffusionHomeController to DiffusionRepositoryListController

Summary: Improves consistency across applications.

Test Plan: Loaded `/diffusion/`.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D6916

src/applications/diffusion/controller/DiffusionRepositoryListController.php

@@ -1,6 +1,6 @@
 <?php
 
-final class DiffusionHomeController extends DiffusionController {
+final class DiffusionRepositoryListController extends DiffusionController {
 
   public function processRequest() {
     $request = $this->getRequest();