* io_scheduler uses thread pool to schedule work
fixes#41
* use task_container in bench tcp server test
* adjust benchmark for github actions CI
* fix io_scheduler tests cross thread memory boundaries
* more memory barriers
* sprinkle some shutdowns in there
* update readme
* udp_peer!
I hope using the udp peer makes sense on how udp packets are
sent and received now. Time will tell!
* Fix broken benchmark tcp server listening race condition