------------------
* Added :attr:`hunter.event.Event.thread`.
* Added :attr:`hunter.event.Event.threadid` and :attr:`hunter.event.Event.threadname`
(available for filtering with :func:`hunter.Q`).
* Added :attr:`hunter.event.Event.threading_support` argument to :func:`hunter.trace`.
It makes new threads be traced and changes action output to include thread name.
* Added support for using `pdb++ <https://pypi.org/project/pdbpp/>`_ in the :class:`hunter.actions.Debugger` action.
* Added support for using `manhole <https://pypi.org/project/manhole/>`_ via a new :class:`hunter.actions.Manhole`
action.
* Made the :attr:`hunter.event.Event.handler` a public but readonly property.