COMPRESS-296 Parallel compression. Add support for cloning ZipArchiveOutputStream

With these changes it is possible to realize parallel compression. There is one more class coming that coordinates it all

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/compress/trunk@1646532 13f79535-47bb-0310-9956-ffa450edef68
2 files changed