Vienna 3.1.0 Beta 5

• Fix problem w/ subscribing to some feeds
• Better handling of legal/illegal characters in URL strings
• Fix enclosure download when the URL string contains a query
• If adding existing feed, focus it
• Keep order of folders and groups on OPML export
• Fix some styles to limit maximum image size
• Improve the ad blocking feature of the Feedlight styles
• Recognize a few more file extensions to be directly downloaded
• Fix some crashes

(Binaries built with Xcode 7.1.1)