Core:
* error reporting facilities
* add support for different character sets (to 'all' extractors)

Untested code:
* QuickTime is untested: it may or may not work
  => also: check with code from bitzi collider

'Unclean' code:
* QT
* ASF
* RPM

Incomplete code (missing features):
* RIFF (idx1 attribute)
* IDv2{3,4} (some attributes)
* StarOffice sdw (some attributes, see doc/)
* man pages (interpret sections for authors, brief description)

Desirable missing formats:
* info pages (scan for 'Node: %s^?ID' - see end of .info files!)
* sources (Java, C, C++, see doxygen!)
* EXIF (www.exif.org)
* a.out (== ar?)
* rtf 
* EXE
* APEv2 (MPC file format, www.personal.uni-jena.de/~pfk/mpp/sv8/apetag.html)



