Bug fixes:
#328 Add option to handle passwords with or without utf8 charset
#333 Fix issue with reading 7Zip split files with headers not just in first split part
#421 Remove clone method
#428 Add close method in NumberedSplitRandomAccessFile
#432 Fallback to zip standard charset if utf-8 flag is not set
#433 Add directories to zip as well when symlink target is a directory
#434 Use last modified file time from ZipParameters
#435 Add null check when getting and applying Windows file attributes
#438 Remove lines to skip reading content if entry is directory