Broqer

All main issues are closed -> Release Version 1.0

Fixing coroutine queue for MapAsync

* added ``op.map_threaded``
* added ``op.just``
* added ``Hub``
* added ``.reset()`` to ``op.debounce`` and ``op.throttle``
* added ``retrigger_value`` to ``op.debounce``
* added ``duetime`` attibute to ``op.debounce``

* added flake8, mypy and rstcheck to continous integration
* fixed typo in README.rst