Sparrow has released an update to its advanced e-mail app for the iPhone and iPod touch adding several new features and quashing a few bugs in the process. Based on the Sparrow Mac e-mail client, the iOS version provides a number of advanced features such as Priority Inbox, labels and archiving for Gmail accounts along with a unified inbox, photo attachment support and a swipe gesture based user interface. Sparrow 1.1 now includes a built-in web browser…