- Updated AAC and MP3 MIME types to be the ones HTML5 audio wants
- Created DateTime extension method to format dates as RFC 1123 strings for HTTP header use
- Added Last-Modified / ETag headers for all file transfers, instead of just the Art and Web API handlers
- Fixed range request support when sending files (fixes playback problems with iOS <audio> tag)
- Fixed merge conflict. I had removed the "Connection: close" header accidentally.