整理了channel create逻辑，第一个sub请求触发生成channel，channel未生成情况下publish返回错误no sub
Merge branch 'dev' of code.sohuno.com:kzapp/push-server into dev
change post method
format log
Merge branch 'dev' of code.sohuno.com:kzapp/push-server into dev
fixed ack response
add config file in worker
Merge branch 'dev' of code.sohuno.com:kzapp/push-server into dev
add docs
fixed param error
fix err ok range copy bug
add bench test
Merge branch 'dev' of code.sohuno.com:kzapp/push-server into dev
add guid test
add bench_mongo
add ignore
fix log and add broker array in worker
clean code
sync docs
docs