Provide convenience method addTextCrumb() to PhabricatorCrumbsView

Summary: We currently have a lot of calls to `addCrumb(id(new PhabricatorCrumbView())->...)` which can be expressed much more simply with a convenience method. Nearly all crumbs are only textual.

Test Plan:
  - This was mostly automated, then I cleaned up a few unusual sites manually.
  - Bunch of grep / randomly clicking around.

Reviewers: btrahan, chad

Reviewed By: btrahan

CC: hach-que, aran

Differential Revision: https://secure.phabricator.com/D7787

src/applications/auth/controller/PhabricatorAuthRegisterController.php

@@ -401,17 +401,11 @@ final class PhabricatorAuthRegisterController
     $crumbs = $this->buildApplicationCrumbs();
 
     if ($is_setup) {
-      $crumbs->addCrumb(
-        id(new PhabricatorCrumbView())
-          ->setName(pht('Setup Admin Account')));
+      $crumbs->addTextCrumb(pht('Setup Admin Account'));
         $title = pht('Welcome to Phabricator');
     } else {
-      $crumbs->addCrumb(
-        id(new PhabricatorCrumbView())
-          ->setName(pht('Register')));
-      $crumbs->addCrumb(
-        id(new PhabricatorCrumbView())
-          ->setName($provider->getProviderName()));
+      $crumbs->addTextCrumb(pht('Register'));
+      $crumbs->addTextCrumb($provider->getProviderName());
         $title = pht('Phabricator Registration');
     }