Just added: Dropbox support and .M4A export

Hey again, just wanted to give another quick update the a the new versions coming out in the next week or so will now feature Dropbox support for exporting your audio sessions directly to your Dropbox account, and you'll also be able to export your files in .M4A format (MPEG-4 - AAC), a compressed format that's higher quality than mp3. Stay tuned for more updates on the way!