Merge pull request #47 from LantaoJin/master

log4j plus to comma
Merge pull request #6 from dianping/master

sync
remove common-io dependency
Merge pull request #48 from ErikFang/master

remove common-io
Merge pull request #49 from LantaoJin/master

no reposition
Merge pull request #24 from dianping/master

sync