Modernize Paste

Summary:
  - Add a PhabricatorApplication.
  - Make most of the views work well on tablets / phones. The actual "Create" form doesn't, but everything else is good -- need to make device-friendly form layouts before I can do the form.

Test Plan: Will attach screenshots.

Reviewers: btrahan, chad, vrana

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1569

Differential Revision: https://secure.phabricator.com/D3293

src/aphront/configuration/AphrontDefaultApplicationConfiguration.php

@@ -196,11 +196,6 @@ class AphrontDefaultApplicationConfiguration
 
       '/status/' => 'PhabricatorStatusController',
 
-      '/paste/' => array(
-        '' => 'PhabricatorPasteListController',
-        'filter/(?P<filter>\w+)/' => 'PhabricatorPasteListController',
-      ),
-      '/P(?P<id>\d+)' => 'PhabricatorPasteViewController',
 
       '/help/' => array(
         'keyboardshortcut/' => 'PhabricatorHelpKeyboardShortcutController',