accesslog.go:Add feature:add ReadFilenames function
accesslog_test.go:Add feature test:add ReadFilenames test function
stage.go:Refactor:change the way to read files
exporter.go:Delete feature:now the function do nothing
Refactor:change conf
accesslog_test.go:Delete:delete a test fun
Merge pull request #10 from bambooZhou/feature1

Feature1