CPIO archives

Hi Yannick,

I have some suggestions (no offence intended) regarding the cpio handling:

1. the CPIOPayloadArchive should read the data from an InputStream or
   DataInputStream, so that a rpm file can be read continuously.
2. The CPIOPayloadArchive should not write to the disk unasked. So the
   the data should be held in memory. It would help to make some actions
   faster (e.g. list of all files, calculate signatures, ...)
3. We should use BufferedInputStream wherever an InputStream is initialized.
   I have tested on a large rpm file (ca. 70 MB) and it was very slow.

I can do some work there but I don't want to conflict with your changes.

I have also played with the idea to include a text formatter for the
datatypes so
that displaying these can be configured. But at the moment I have no good
idea
how to solve this.

And there is also the regular work to do. Like cleaning up the flat *sigh*.

Greets,
   Micha

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