Enable akka cluster mode
support master HA
optimize the imports
HA
add master log
master ha
add gitignore
Merge pull request #22 from manuzhang/add_gitignore

add gitignore
master HA
refactor the contants
Refine the cluster message
master HA
fix ha bug
merge with intel-hadoop/gearpump
fix merge issue
fix compile issues
fix command line options for shell commands
fix client app shutdown bug
add more logs
fix HA bug