[Zope] FieldedTextIndex weighting implemented

I have an initial implementation of the per-field weighting checked into cvs. I haven't released 0.2 yet, but I expect to sometime in the next week or so. The new feature is unit-tested and documented in the README, so feel free to check it out in the mean time. You can download it directly from CVS at: http://cvs.zope.org/Products/FieldedTextIndex/ There is a link to generate a tarball at the bottom, or you can check in out using anonymous cvs if you want to track changes. Let me know what you think. -Casey