[uf-new] hAudio - audio-album and audio-podcast

[Manu Sporny]

There are only two things that are strongly supported by the
audio-info-examples right now. Audio albums and audio podcasts
(collections of audio). Here are the options:

Option #1: audio-album/audio-podcast as a container

audio-album as the container. The first haudio describes the audio-album
and every successive haudio describes an item in the audio album.
audio-podcast would use the same type of markup.

audio-album
   haudio (this haudio describes the album)
   haudio (this is the first track in the album)
   haudio (this is the second track in the album)

Option #2: audio-album/audio-album-item as container/subcontainer

audio-album as the container. The haudio that describes the item is
specifically identified in this proposal. Each item is also specified.

audio-album
   audio-album-description
      haudio
   audio-album-item
      haudio
   audio-album-item
      haudio

Option #3: audio-collection (instead of audio-album/audio-podcast)

Instead of albums and podcasts, a more flexible/generic method of
describing audio collections could be used.

audio-collection
   audio-collection-description
      haudio
   audio-collection-item
      haudio
   audio-collection-item
      haudio

Feedback on each option or proposal of new options would be helpful.

-- manu