Add a lost connection like test; Change connection.close/query method
Update mysql-robin to 2.0.8
Add conntion clean in remove method
Merge pull request #11 from iseeyou1987/master

Fix the "Connection lost" error
update version to 0.2.6
Fix a pool bug (when a connection idle timeout removed, the _stack and _conn don\t matched.)
Merge pull request #12 from iseeyou1987/master

Fix a bug in Pool
update version to 0.2.7
Update README.md