Groups now keep members in lists instead of dictionaries.
Groups now keep members in lists instead of dictionaries.

This allows one to impose an order by simply ordering the metadata. This is
useful for consistent plotting.

datreant/datreant.data,datreant/datreant,dotsdl/datreant,datreant/datreant,andreabedini/datreant,datreant/datreant.core,datreant/datreant.core