Modernize UIExamples

Summary:
  - Get rid of an AphrontSideNavView callsite.
  - Modernize and simplify the application implementation.
  - Doesn't work perfectly on tablet/phone but that's because not all the UI examples work there yet.

Test Plan: Looked at /applications/ and /uiexample/.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D3431

src/aphront/configuration/AphrontDefaultApplicationConfiguration.php

@@ -166,11 +166,6 @@ class AphrontDefaultApplicationConfiguration
           => 'HeraldTranscriptController',
       ),
 
-      '/uiexample/' => array(
-        '' => 'PhabricatorUIExampleRenderController',
-        'view/(?P<class>[^/]+)/' => 'PhabricatorUIExampleRenderController',
-      ),
-
       '/owners/' => array(
         '' => 'PhabricatorOwnersListController',
         'view/(?P<view>[^/]+)/' => 'PhabricatorOwnersListController',