===================
Added
-----
* User attributes now support nested dictionaries i.e. besides a string, boolean
or an integer the value of an attribute can be another dictionary.
* The ``default_port`` field of pad_instances now support dictionaries of pad_name
to port mappings. See the correspondingly updated ``default_port`` section in
the docs.
Changed
-------
* User Attributes of ports, port_groups and pad_instances are now
expanded as well when instantiated multiple times. The same mini
expression languages applies.
* Improved manifest version warning messages
* Bumped manifest version to 3.
Fixed
-----