Show more information on revision views

Summary:
Show line count, arcanist project and base revision.

This adds a little clutter but I think we're still okay and I can play around
with it later.

Test Plan: Looked at a couple of revisions. I'm actually not 100% sure about the
SVN logic but maybe I will test that before committing.
Reviewed By: tomo
Reviewers: tomo, jungejason, tuomaspelkonen, aran
CC: aran, tomo
Differential Revision: 685

src/applications/differential/controller/revisionview/DifferentialRevisionViewController.php

@@ -99,6 +99,10 @@ class DifferentialRevisionViewController extends DifferentialController {
       }
     }
 
+    if ($target->getArcanistProjectPHID()) {
+      $object_phids[] = $target->getArcanistProjectPHID();
+    }
+
     foreach ($revision->getAttached() as $type => $phids) {
       foreach ($phids as $phid => $info) {
         $object_phids[] = $phid;
@@ -457,6 +461,13 @@ class DifferentialRevisionViewController extends DifferentialController {
       $properties['Commits'] = implode('<br />', $links);
     }
 
+    $properties['Lines'] = number_format($diff->getLineCount());
+    $arcanist_phid = $diff->getArcanistProjectPHID();
+    if ($arcanist_phid) {
+      $properties['Arcanist Project'] = phutil_escape_html(
+        $handles[$arcanist_phid]->getName());
+    }
+
     $properties['Apply Patch'] =
       '<tt>arc patch D'.$revision->getID().'</tt>';
     $properties['Export Patch'] =