Asynq

* Improve installation procedure
* Expose asynq.mock.patch.stopall
* Improvements to exception propagation
* Bug fixes
* Improve acached_per_instance implementation

changes to rarely used parts of the library.

* Performance improvements: apps using asynq may run up to 20% faster
* Add asynq and .asynq() as forward compatible aliases
* Add a debug option to log synchronous calls
* Enhancements to asynq.tools.deduplicate()
* Fixed batching when yielding dictionaries
* Add a debug option to collect profiling stats
* Fix display of chained stack traces in Python 3

* Add an asynq stack trace formatter for loggers
* Enable using objects with a custom __reduce__ in acached_per_instance()
* Add *args and **kwargs to utils.execute_on_separate_scheduler
* Add AsyncEventHook
* Fix some Python 3 test failures
* Add AsyncTimer

* Initial public release