Revert "folders name refactoring"

This reverts commit 7182dd002ed5fd36ac91e95e96ae26d031a1efe4.
Revert "Remove namespace"

This reverts commit 0082c412cdaa10b704cb19df756a0daad7804cbf.
Revert "Update README.md"

This reverts commit d15ecf50dc137ebde70269fc095d49be802f1843.
reverting some commits