refactor the parent child relication, to let executor report to appmaster
Merge branch 'master' of https://github.com/clockfly/gearpump
optimize imports
refactor layout
optimize the imports
fix config
refine the code
Refactor the message passing
refactor the message passing layer.
update copyrights.
Enable akka cluster mode
support master HA
optimize the imports
HA
add master log
Merge pull request #1 from clockfly/master

sync from clockfly/gearpump