made DiffusionHomeController use commit summaries

Summary: Latest commit in repositories are displayed together with their summaries if available

Test Plan:
Diffusion did not crash - a good sign

commit summaries also only appear on Diffusion Home //only// - as expected

Reviewers: epriestley, btrahan, chad

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5117

src/applications/diffusion/controller/DiffusionHomeController.php

@@ -130,7 +130,6 @@ final class DiffusionHomeController extends DiffusionController {
             'href' => '/diffusion/'.$repository->getCallsign().'/',
           ),
           $repository->getName()),
-        $repository->getDetail('description'),
         PhabricatorRepositoryType::getNameForRepositoryType(
           $repository->getVersionControlSystem()),
         $size,
@@ -138,7 +137,8 @@ final class DiffusionHomeController extends DiffusionController {
         $commit
           ? DiffusionView::linkCommit(
               $repository,
-              $commit->getCommitIdentifier())
+              $commit->getCommitIdentifier(),
+              $commit->getSummary())
           : '-',
         $date,
         $time,
@@ -166,7 +166,6 @@ final class DiffusionHomeController extends DiffusionController {
     $table->setHeaders(
       array(
         'Repository',
-        'Description',
         'VCS',
         'Commits',
         'Lint',
@@ -177,11 +176,10 @@ final class DiffusionHomeController extends DiffusionController {
     $table->setColumnClasses(
       array(
         'pri',
-        'wide',
         '',
         'n',
         'n',
-        'n',
+        'wide',
         '',
         'right',
       ));
@@ -190,7 +188,6 @@ final class DiffusionHomeController extends DiffusionController {
         true,
         true,
         true,
-        true,
         $show_lint,
         true,
         true,