Ported over Category Graph (untested).
Changed CategoryMember to allow Categories to be members of a Category, in line with actual Wikipedia practice.
Ported over CategoryGraph, CategoryDistance, and CategoryBfs (untested).
Changed CategoryMember to allow Categories to be members of a Category, in line with actual Wikipedia practice.
CategoryGraphSimilarity
CategoryGraph uses SqlCache for speed.
Fixed problem with Similarity Disambiguator.