Bld extension for working with archives

A bld extension for generating archives.

It's in an incomplete state and currently only generates ZIP archives that preserve the original Posix file permissions. Support for additional features will be added soon.

The complete documentation can be found in its javadocs.

This is a short example of how to create a ZIP archive of a directory:

@BuildCommand
public void zip()
throws Exception {
    new ZipOperation()
        .sourceDirectories(new File("dir/to/zip"))
        .destinationDirectory(new File("destination/dir"))
        .destinationFileName("archive.zip")
        .execute();
}