SpamBayes full changelog

· Update pycksum.py to try and identify more duplicates
· Add scale and charset options to ImageStripper
· Stitch spam images back together properly, add a couple more tokens
· Add support for PIL to ImageStripper.py
· Cache x-lookup_ip in a pickle instead of trying to use anydbm or zodb
· Add crude OCR capability to try and parse image-based spam using Ocrad & NetPBM
· Add x-short_runs option
· Add x-image_size option & corresponding token
· Add Matt Cowles' x-lookup_ip extension w/ slight modifications
· Add profiling using cProfile (if available) to sb_filter.py
· Delete -d and -p flags from spamcounts.py
· Refactor basic text tokenizing out of tokenize_body into a separate method, tokenize_text
· Explicitly close ZODB store in tte.py
· Fix bug in regex preventing valid IPs
· Suppress spurious duplicate From_ lines in sb_bnfilter.py
· Add simple parts of [ 824651 ] Multibyte message support