Add option to disable Eigen: fix #542
Add a blank line for readability
Improve get_status
Delete join
Remove default value of mixer
Merge branch 'develop' into option-disable-eigen
Do not install Eigen if disabled
fix #619 deleting join option from jubactl and jubavisor
disabling mix if parameter 0 is given
Merge pull request #622 from jubatus/feature/remove_join_from_server_argv

fix #619 deleting join option from jubactl and jubavisor
push_mixer should be disabled too
validate range of --rpc-port option (fix #605)
invalid inteval_sec and interval_count should be alerted
Merge pull request #623 from jubatus/feature/disabling_mix

Disabling mix if parameter 0 is given
recover lost chagnes in 41f4d9a; refs #611
Use const reference
Merge branch 'develop' of https://github.com/jubatus/jubatus into improve_get_status
Not use boolalpha in use_cht
Move initialization position of start_time
Use int precision in uptime