[Spambayes] CL histograms

[Tim Peters]

[Brad Clements]
> Actually, my .ini doesn't specify nbuckets, but my histograms are
> still 40 lines.. ??

Right, nbuckets defaults to 40.  All options and their default values are in
Options.py.

For central limit runs, I recommend this base .ini file.  "base" means it's
irrelevant to test evaluation how you set the various display options
(whether you want to see false negatives and/or f-p, how many characters you
want to clamp those to, whether you want to save pickles, etc -- none of
that has any effect on error rates, or on the stuff that displays error
rates):

"""
[Classifier]
use_central_limit2: True
# or use_central_limit: True
# or use_central_limit3: True
max_discriminators: 50
zscore_ratio_cutoff: 1.9

[TestDriver]
spam_cutoff: 0.50
nbuckets: 4
"""