Group display

[paultaylor]

I think that parts makes sense.

However, would be good if Group could be viewed directly under a Composer index or another index, like albums or items. As it is you have to seperately define a Works index to see works underneath another index, and because Work Index is not a special container like albums or items only very basic information is returned.

So my question would be is it possible/logical for group to be used to create a groups container (like albums) that could be returned for other containers, and it would return the artist role info like album. This would also then mean that a Works index would no longer be necessary.