Initial commit
init repo and add draft
update submodule
add trace logic and impl core messaging logic
update and add more tests
move all mock to meta/trace helper
add more tests
bugfix for passing accesstoken and traceid
add reply support with context
error can be passed
update top-link
update logger
update trace
#24;add domain to support physical isolation between endpoints
bugfix:make passing access_token thread-safe
add topic based identity design, make topic of pub/sub clear via api
add topic field to request message
remove unused code and update comments
update metahelper and trace
update defaultmetahelper;make error text split