additional work on the broadcast server example
adds common/thread header and updates concurrency policies to use it
updates copyright year
adds common chrono header
adds basic logger class, with tests, and updates configs to include it
whitespace
splits asio/asio_no_tls up a bit better, adds logging information to configs
updates tests for logger
Switches cout based logging to logging policy
adds a typedef for logging levels
adds pass through logging adaptor to endpoint
adds some logger tests
adds default logging settings to echo_server and catches more setup exceptions