Move Conduit methods inside applications

Test Plan:
/conduit/
/conduit/method/arcanist.projectinfo/
Call method

  $ echo '{}' | arc call-conduit user.whoami

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4268

src/applications/phpast/controller/PhabricatorXHPASTViewInputController.php

@@ -0,0 +1,11 @@
+<?php
+
+final class PhabricatorXHPASTViewInputController
+  extends PhabricatorXHPASTViewPanelController {
+
+  public function processRequest() {
+    $input = $this->getStorageTree()->getInput();
+    return $this->buildXHPASTViewPanelResponse(
+      phutil_escape_html($input));
+  }
+}