Merge branch 'release/0.6.0'
bump version
Merge branch 'release/0.6.1'
Merge branch 'release/0.6.2'

Conflicts:
	ChangeLog
	install.sh
Merge branch 'develop'
update to apr-util-1.5.4
Merge pull request #26 from jubatus/apr-util-1.5.4

update to apr-util-1.5.4
bump version
Merge branch 'release/0.6.3' into develop
bump version
Merge branch 'release/0.6.4' into develop