Support logged-out users in Fund

Summary: Ref T5835. Sprinkle `shouldAllowPublic()` around to let logged-out users gain access.

Test Plan: Viewed an initiative while logged out.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T5835

Differential Revision: https://secure.phabricator.com/D10683

src/applications/fund/controller/FundInitiativeViewController.php

@@ -5,6 +5,10 @@ final class FundInitiativeViewController
 
   private $id;
 
+  public function shouldAllowPublic() {
+    return true;
+  }
+
   public function willProcessRequest(array $data) {
     $this->id = $data['id'];
   }