rename backtrace example to stack-trace. add main.icc to implement boiler plate. use main.icc for examples.
remove default_stacksize as deprecated. remove taskmain experiment in favor of task::main. use task::main in examples and tests
introduce method name matching into HTTP server routing
add hs::app_json hs::app_json_utf8
uri: use std::forward where appropriate
introduce sliding time aggregate statistics