fix "os.Exit won't execute defer" bug
Merge branch 'master' of github.com:Terry-Mao/gopush-cluster
Merge branch 'master' of github.com:Terry-Mao/gopush-cluster
Merge branch 'master' of github.com:Terry-Mao/gopush-cluster
add dependencies shell
use pure golang zk lib instread cgo lib
Merge branch 'master' of github.com:Terry-Mao/gopush-cluster