spamprobe-1.3x2 released

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I've just released another experimental spamprobe snapshot.  This one 
adds a feature suggested by Nico to help combat wordless spams.  If 
configure finds a working libungif and gif_lib.h on your system then 
spamprobe will use that library to extract useful terms from gif 
attachments in emails.

The goal is to add extra terms for use by the scoring algorithm in 
emails that don't have many other terms to work with.  I've experimented 
with it here some and the gif related terms become pretty spammy but not 
completely damning.  That's good since it means the terms will be useful 
when there isn't a lot of content but won't condemn otherwise innocent 
emails just because they have a gif attached.

I didn't really want to add a dependency to other packages but in this 
case spamprobe should continue to work as it always have if you don't 
have libungif so it's not really a dependency. :-)

If this gif analysis feature works out well I can add support for other 
image formats in the future.  In my own experience all of the wordless 
image spams use gif so that seemed like the best place to start.

I've also done some more reorganization of the source code and added a 
- -f command line option to let the user specify a particular config file 
to be used.

If anyone has any problems compiling this version please let me know. 
I've tried it on three different linux systems and Mac OS X 10.4 but 
there could be problems with other OS's.

All the best,
++Brian

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