Add profile images to Repositories

Summary: Builds out some images to use to identify repositories. Fixes T12825.

Test Plan:
Try setting custom, built in, and null images.

{F4998175}

{F4998192}

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T12825

Differential Revision: https://secure.phabricator.com/D18116

src/applications/diffusion/controller/DiffusionRepositoryController.php

@@ -274,7 +274,9 @@ final class DiffusionRepositoryController extends DiffusionController {
       ->setHeader($repository->getName())
       ->setUser($viewer)
       ->setPolicyObject($repository)
-      ->setHeaderIcon('fa-code');
+      ->setProfileHeader(true)
+      ->setImage($repository->getProfileImageURI())
+      ->setImageEditURL('/diffusion/picture/'.$repository->getID().'/');
 
     if (!$repository->isTracked()) {
       $header->setStatus('fa-ban', 'dark', pht('Inactive'));