def addFile(src, dest=nil)
      orig = dest
      dest = File.join(@defaultPath, File.basename(src)) if !dest
      @files[src] = dest
    end
def addFile(src, dest=nil)
      orig = dest
      dest = File.join(@defaultPath, File.basename(src)) if !dest
      @files[src] = dest
    end
Initialize an IzPack-Pack by name, description.
 :attributes: Attributes of the pack, a Hash, eg. { 'required' => 'yes' }
 Add a single file to the pack