Update to MIT license
try to cut down on ping port traffic with health check interval
sweep every 5 instead of 1 and check backend before frontend and local_queue in between
shift off of local queue for ordered processing and concat instead of + for less copy
constantize the empty string
add empty to broker
let server shutdown the context when using a shared context via inproc
Merge pull request #217 from localshred/abrandoned/ping_port_health_check

Abrandoned/ping port health check
bump to 3.3.3