User defined attachment points for export

[scottgcau]

I would like to see the ability to define additional point / point sets that are accurately transformed along with the changes in the model / pose and can be exported to other applications (probably a lot like the joints are handled). These could be used to quickly add props or other stuff to an exported model in the correct position. Just adding a couple of props may not seem worthwhile but you could also use the feature to define a whole heap of attachment points for muscles in an external muscle system.