Add transaction-oriented editing to projects

Summary:
  - Make some editing operations transaction-oriented, like Maniphest. (This
seems to be a good model, particularly for extensibility.) I'll move the rest of
the editing operations to transactions in future diffs.
  - Make transaction-oriented operations publish feed stories.

Test Plan:
  - Created a new project.
  - Edited an existing project.
  - Created a new project via quick create flow from Maniphest.
  - Verified feed stories publish correctly.

Reviewers: btrahan, jungejason

Reviewed By: btrahan

CC: aran, epriestley

Maniphest Tasks: T681

Differential Revision: https://secure.phabricator.com/D1477

src/applications/project/controller/profileedit/PhabricatorProjectProfileEditController.php

@@ -58,10 +58,16 @@ class PhabricatorProjectProfileEditController
     if ($request->isFormPost()) {
 
       try {
+        $xactions = array();
+        $xaction = new PhabricatorProjectTransaction();
+        $xaction->setTransactionType(
+          PhabricatorProjectTransactionType::TYPE_NAME);
+        $xaction->setNewValue($request->getStr('name'));
+        $xactions[] = $xaction;
+
         $editor = new PhabricatorProjectEditor($project);
         $editor->setUser($user);
-        $editor->setName($request->getStr('name'));
-        $editor->save();
+        $editor->applyTransactions($xactions);
       } catch (PhabricatorProjectNameCollisionException $ex) {
         $e_name = 'Not Unique';
         $errors[] = $ex->getMessage();