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/phriction/controller/PhrictionDiffController.php

@@ -107,21 +107,16 @@ final class PhrictionDiffController
       $crumbs->addCrumb($view);
     }
 
-    $crumbs->addCrumb(
-      id(new PhabricatorCrumbView())
-        ->setName(pht('History'))
-        ->setHref(PhrictionDocument::getSlugURI($slug, 'history')));
-
+    $crumbs->addTextCrumb(
+      pht('History'),
+      PhrictionDocument::getSlugURI($slug, 'history'));
 
     $title = pht("Version %s vs %s", $l, $r);
 
     $header = id(new PHUIHeaderView())
       ->setHeader($title);
 
-    $crumbs->addCrumb(
-      id(new PhabricatorCrumbView())
-        ->setName($title)
-        ->setHref($request->getRequestURI()));
+    $crumbs->addTextCrumb($title, $request->getRequestURI());
 
 
     $comparison_table = $this->renderComparisonTable(