Fix jubatus-util headers not found in logger
Replace jubatus_util with JUBATUS_CORE
Remove core_headers from wscript
Remove jubacommon from wscript
Remove jubaconverter from wscript
Remove unnecessary use from jubatus/server/server/wscript
Cosmetics
Fix compile error
push mixer must register as active for proxies
Self dead-locked
Merge pull request #848 from gintenlabo/fix-wscripts

Remove unnecessary use options from wscripts
Merge pull request #819 from jubatus/debug/proxy_of_push_mixer_doesnot_work

push mixer must register as active for proxies
fix clustering::push aggregation function (fix #851)
update ZooKeeper version used in Travis test from 3.4.5 to 3.4.6 (fix #857)
Merge remote-tracking branch 'upstream/master' into develop
Change the order of start-up
fix #842 push_mixer should exclude itself from push candidates
add feature to reload config on SIGHUP (fix #838)
fix for cpplint
remove unnecessary continue statement