[Feature] Add support for playing audio files

[RCheesley]

Thanks for this great product, I wondered if it might be possible to add support for playing the audio files which are attached to notes when 'record audio' is used in Evernote?

At the moment I just download the files & open them up with audio software, but it would be great to be able to play them within Everpad.

They are stored as .amr files so it might require certain codecs to be installed I guess.