- make sure `build autoload` produces the same output on both Windows and Unix platforms (findFiles() turns out to produce a mix of \ and / delimited paths which corrupts the sort order on Windows)

- run `build autoload` to verify that the patch works.
fix #3582: update CHANGELOG according to guidelines at https://github.com/yiisoft/yii/blob/master/CONTRIBUTING.md
Merge branch 'fix-issue-3582'
remove superfluous return statement; actions should return their own return code as they MAY fail (runWithParams)