Merge branch 'feature/connect'
do ReadCodeLine in Close() @ ReadCloser
Merge remote-tracking branch 'upstream/master' into feature/fix_ReadCodeLine
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into feature/fix_ReadCodeLine
Merge pull request #6 from SunRunAway/feature/fix_ReadCodeLine

doing ReadCodeLine in Close() @ ReadCloser