Enable admin to view and delete other users' herald rules

Summary:
enable admin to delete user's herald rules. This is useful for
managing non-active users' rules. For example, ex-employees' rules. The
code change includes:

 - Added a 'All' tab which is only accessible to admin.
 - Refactor out a HeraldRuleListView which is used by both the home
   controller and the all rule controller

Test Plan:
delete an ex-employee rule as an admin; disable myself as
admin and verified that I don't have access to view other user's rules
and I'am not be able to delete them; also verified that as a non-admin,
I can still view, create and delete my own rules.

Reviewers: epriestley, nh

Reviewed By: epriestley

CC: aran, epriestley, jungejason

Differential Revision: 1064

src/aphront/default/configuration/AphrontDefaultApplicationConfiguration.php

@@ -274,6 +274,10 @@ class AphrontDefaultApplicationConfiguration
         'rule/(?:(?P<id>\d+)/)?$' => 'HeraldRuleController',
         'delete/(?P<id>\d+)/$' => 'HeraldDeleteController',
         'test/$' => 'HeraldTestConsoleController',
+        'all/' => array(
+          '$' => 'HeraldAllRulesController',
+          'view/(?P<view>[^/]+)/$' => 'HeraldAllRulesController',
+        ),
         'transcript/$' => 'HeraldTranscriptListController',
         'transcript/(?P<id>\d+)/(?:(?P<filter>\w+)/)?$'
           => 'HeraldTranscriptController',