general:
   renew all error messages
   cleanup all apps
   for all: bump file names when files already exists (esp. extresso)
   make sgml documentation for res scripts

icotool:
   support for small BMPs renamed to ICO?
   do not truncate or overwrite when opening new file.

extresso:
   improved error checking?
   archive support

wrestool:
   do not truncate or overwrite when opening new file (see icotool).
   read files using functions in fileread.c.
   in main, do not check filesize. Add support for '-' as stdin.
   callbacks (do_resource) should be able to fail if returning FALSE.
   write dual level verbosity debug messages!
   count number of resources matched once completed
   better (shorter) extraction filenames (get_destination_name)
   --format option for (raw|res_name|res_id) instead of raw
   --first to extract one resource only (error if none matched)
   count resources --count? error if not found?
   fix language management & naming, for dest filename as well

examples:
   make some reslists, icewm/winoptions, ...
