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
Merge pull request #848 from gintenlabo/fix-wscripts

Remove unnecessary use options from wscripts