SBVR11 — "characteristic type" should be a "category type"

Section 11.1.2.2 "Kinds of Characteristic" on page 136 says that
"characteristic type" is "General Concept: concept type". I suggest that
"General Concept: categorization type" would be more accurate.

Given this proposal, in EU-Rent, making "branch type" a "characteristic
type" would enable statements such as "if there exists a branch that is a
city branch ...."

Correct the entries for categorization type and characteristic type to reflect that categorization type is a special kind of concept type, and characteristic type is a specialized kind of categorization type. Also, update the discussion in Annex D that explains/illustrates these concepts.