[TYPO3-english] indexed_search: add functionality to search in .zip, .tbz, .tgz and .tar archives

[andreas.lappe at konplan.com]

Hey folks,

I saw that indexed_search already uses unzip for
OpenOffice.org-documents. So I patched our installation to also
search in zip files. And while I was at it, I added support for tar
files and, again assuming that your tar build has support for bzip2
and gzip, .tbz and tgz.

As there's no public repository at forge.typo3.org for
indexed_search I just post it here, in case someone finds it useful.
Better would be to open a repository for IS so one can properly add
the stuff there...

With the same stuff and just some more switches it would also work
for .tar.gz and .tar.bz2 but as I didn't need that yet I didn't do
it (yet).

So long
Andy