Fix tests
2.5.7 released
Modify .jshintrc
Box.process: Fix error when pattern is not defined
Add 2 static properties to Box: File, Pattern
Refactor Scaffold API with Box module
Ignore files whose name started with _
Merge branch 'feature/scaffold-box' into dev
Merge branch 'dev' into feature/extract-renderer
Simplify `hexo init` procedure