groups: also display available environment groups. (RhBug:1029948)
rename: Base.group_lists -> Base._group_lists.

To make it look clearly non-API.
doc: api: document the dnf.subject.Subject API.
fix: installs globbing for a file without a slash at the start. (RhBug:1030998)
doc: api: document dnf.transaction.Transaction.
removed latest_per_arch function from query.py
removed _construct_result function from query.py
removed per_arch_dict function from query.py
removed shelve support in persistor.py