Silvio Rizzi’s Reeder 2 ($5), an RSS, Feedbin, and Feedly client, has undergone a number of changes in version 2.2, including the ability to handle feed links from external apps. The app now features optional background refresh capabilities, and a loading progress indicator within the in-app browser. Smart streams can now also be grouped by feed or date, and a few navigation tweaks have also been made. There are also many bug fixes. There’s…