Various fixes and tidy-ups: * finish narrow/bytes version * fix bug in is_symlink handling * remove TODOs * start of listdir() implemented via ScandirIterator
Various fixes and tidy-ups:
* finish narrow/bytes version
* fix bug in is_symlink handling
* remove TODOs
* start of listdir() implemented via ScandirIterator

benhoyt/scandir,benhoyt/scandir